diff --git a/source/Makefile.mk b/source/Makefile.mk
index 180689a31..754d1603d 100644
--- a/source/Makefile.mk
+++ b/source/Makefile.mk
@@ -175,7 +175,7 @@ FLUIDSYNTH_LIBS  = $(shell pkg-config --libs fluidsynth)
 endif
 
 ifeq ($(HAVE_LINUXSAMPLER),true)
-LINUXSAMPLER_FLAGS = $(shell pkg-config --cflags linuxsampler)
+LINUXSAMPLER_FLAGS = $(shell pkg-config --cflags linuxsampler) -Wno-unused-parameter
 LINUXSAMPLER_LIBS  = $(shell pkg-config --libs linuxsampler)
 ifeq ($(WIN32),true)
 LINUXSAMPLER_LIBS += -lrpcrt4
diff --git a/source/backend/Makefile.mk b/source/backend/Makefile.mk
index 09c7d4e8e..b83e1bbcd 100644
--- a/source/backend/Makefile.mk
+++ b/source/backend/Makefile.mk
@@ -19,8 +19,8 @@ BUILD_CXX_FLAGS += $(QTXML_FLAGS)
 BUILD_CXX_FLAGS += -DWANT_NATIVE
 
 ifeq ($(CARLA_PLUGIN_SUPPORT),true)
-BUILD_CXX_FLAGS += -DWANT_LADSPA
-# -DWANT_DSSI -DWANT_LV2 -DWANT_VST
+BUILD_CXX_FLAGS += -DWANT_LADSPA -DWANT_DSSI -DWANT_LV2
+# -DWANT_VST
 # ifeq ($(CARLA_VESTIGE_HEADER),true)
 # BUILD_CXX_FLAGS += -DVESTIGE_HEADER
 # endif
@@ -36,9 +36,9 @@ ifeq ($(HAVE_FLUIDSYNTH),true)
 BUILD_CXX_FLAGS += -DWANT_FLUIDSYNTH
 endif
 
-# ifeq ($(HAVE_LINUXSAMPLER),true)
-# BUILD_CXX_FLAGS += -DWANT_LINUXSAMPLER
-# endif
+ifeq ($(HAVE_LINUXSAMPLER),true)
+BUILD_CXX_FLAGS += -DWANT_LINUXSAMPLER
+endif
 
 # --------------------------------------------------------------
 
diff --git a/source/backend/engine/CarlaEngine.cpp b/source/backend/engine/CarlaEngine.cpp
index 554f09f7e..1477542a2 100644
--- a/source/backend/engine/CarlaEngine.cpp
+++ b/source/backend/engine/CarlaEngine.cpp
@@ -368,9 +368,9 @@ void CarlaEngineProtectedData::processRackFull(float** const inBuf, const uint32
     {
         bool first = true;
 
-        for (List<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < inCount);
 
             if (first)
@@ -396,9 +396,9 @@ void CarlaEngineProtectedData::processRackFull(float** const inBuf, const uint32
     {
         bool first = true;
 
-        for (List<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < inCount);
 
             if (first)
@@ -425,9 +425,9 @@ void CarlaEngineProtectedData::processRackFull(float** const inBuf, const uint32
     // connect output buffers
     if (rack->connectedOuts[0].count() != 0)
     {
-        for (List<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < outCount);
 
             FLOAT_ADD(outBuf[port], rack->out[0], nframes);
@@ -436,9 +436,9 @@ void CarlaEngineProtectedData::processRackFull(float** const inBuf, const uint32
 
     if (rack->connectedOuts[1].count() != 0)
     {
-        for (List<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < outCount);
 
             FLOAT_ADD(outBuf[port], rack->out[1], nframes);
@@ -601,9 +601,8 @@ bool CarlaEngineEventPort::writeControlEvent(const uint32_t time, const uint8_t
     CARLA_SAFE_ASSERT_RETURN(channel < MAX_MIDI_CHANNELS, false);
     CARLA_SAFE_ASSERT(value >= 0.0f && value <= 1.0f);
 
-    if (type == kEngineControlEventTypeParameter)
-    {
-        CARLA_ASSERT(! MIDI_IS_CONTROL_BANK_SELECT(param));
+    if (type == kEngineControlEventTypeParameter) {
+        CARLA_SAFE_ASSERT(! MIDI_IS_CONTROL_BANK_SELECT(param));
     }
 
     const float fixedValue(carla_fixValue<float>(0.0f, 1.0f, value));
@@ -1998,9 +1997,9 @@ bool CarlaEngine::patchbayDisconnect(const int connectionId)
 
     CARLA_SAFE_ASSERT_RETURN_ERR(rack->usedConnections.count() > 0, "No connections available");
 
-    for (List<ConnectionToId>::Itenerator it=rack->usedConnections.begin(); it.valid(); it.next())
+    for (LinkedList<ConnectionToId>::Itenerator it=rack->usedConnections.begin(); it.valid(); it.next())
     {
-        const ConnectionToId& connection(it.getConstValue());
+        const ConnectionToId& connection(it.getValue());
 
         if (connection.id == connectionId)
         {
@@ -2019,7 +2018,7 @@ bool CarlaEngine::patchbayDisconnect(const int connectionId)
             }
             else if (targetPort >= RACK_PATCHBAY_GROUP_AUDIO_OUT*1000)
             {
-                CARLA_ASSERT(carlaPort == RACK_PATCHBAY_PORT_AUDIO_OUT1 || carlaPort == RACK_PATCHBAY_PORT_AUDIO_OUT2);
+                CARLA_SAFE_ASSERT_RETURN(carlaPort == RACK_PATCHBAY_PORT_AUDIO_OUT1 || carlaPort == RACK_PATCHBAY_PORT_AUDIO_OUT2, false);
 
                 const int portId(targetPort-RACK_PATCHBAY_GROUP_AUDIO_OUT*1000);
 
@@ -2034,7 +2033,7 @@ bool CarlaEngine::patchbayDisconnect(const int connectionId)
             }
             else if (targetPort >= RACK_PATCHBAY_GROUP_AUDIO_IN*1000)
             {
-                CARLA_ASSERT(carlaPort == RACK_PATCHBAY_PORT_AUDIO_IN1 || carlaPort == RACK_PATCHBAY_PORT_AUDIO_IN2);
+                CARLA_SAFE_ASSERT_RETURN(carlaPort == RACK_PATCHBAY_PORT_AUDIO_IN1 || carlaPort == RACK_PATCHBAY_PORT_AUDIO_IN2, false);
 
                 const int portId(targetPort-RACK_PATCHBAY_GROUP_AUDIO_IN*1000);
 
@@ -2049,7 +2048,7 @@ bool CarlaEngine::patchbayDisconnect(const int connectionId)
             }
             else
             {
-                CARLA_ASSERT(false);
+                CARLA_SAFE_ASSERT_RETURN(false, false);
             }
 
             callback(ENGINE_CALLBACK_PATCHBAY_CONNECTION_REMOVED, connection.id, connection.portOut, connection.portIn, 0.0f, nullptr);
diff --git a/source/backend/engine/CarlaEngineInternal.hpp b/source/backend/engine/CarlaEngineInternal.hpp
index 1933d6a46..86f74eeb6 100644
--- a/source/backend/engine/CarlaEngineInternal.hpp
+++ b/source/backend/engine/CarlaEngineInternal.hpp
@@ -24,7 +24,7 @@
 #include "CarlaPlugin.hpp"
 
 #include "CarlaMutex.hpp"
-#include "List.hpp"
+#include "LinkedList.hpp"
 
 #ifdef HAVE_JUCE
 # include "juce_audio_basics.h"
@@ -205,12 +205,12 @@ struct EngineRackBuffers {
     float* out[2];
 
     // connections stuff
-    List<uint> connectedIns[2];
-    List<uint> connectedOuts[2];
+    LinkedList<uint> connectedIns[2];
+    LinkedList<uint> connectedOuts[2];
     CarlaMutex connectLock;
 
     int lastConnectionId;
-    List<ConnectionToId> usedConnections;
+    LinkedList<ConnectionToId> usedConnections;
 
     EngineRackBuffers(const uint32_t bufferSize)
         : lastConnectionId(0)
diff --git a/source/backend/engine/CarlaEngineJack.cpp b/source/backend/engine/CarlaEngineJack.cpp
index e5c27310f..f8307314b 100644
--- a/source/backend/engine/CarlaEngineJack.cpp
+++ b/source/backend/engine/CarlaEngineJack.cpp
@@ -17,9 +17,7 @@
 
 #include "CarlaEngineInternal.hpp"
 #include "CarlaBackendUtils.hpp"
-#include "CarlaMIDI.h"
 
-#include "List.hpp"
 #include "jackbridge/JackBridge.hpp"
 
 #include <cmath>
@@ -251,9 +249,8 @@ public:
         CARLA_SAFE_ASSERT_RETURN(param < 0x5F, false);
         CARLA_SAFE_ASSERT(value >= 0.0f && value <= 1.0f);
 
-        if (type == kEngineControlEventTypeParameter)
-        {
-            CARLA_ASSERT(! MIDI_IS_CONTROL_BANK_SELECT(param));
+        if (type == kEngineControlEventTypeParameter) {
+            CARLA_SAFE_ASSERT(! MIDI_IS_CONTROL_BANK_SELECT(param));
         }
 
         uint8_t size    = 0;
@@ -768,16 +765,10 @@ public:
 #ifndef BUILD_BRIDGE
     const char* renamePlugin(const unsigned int id, const char* const newName) override
     {
-        CARLA_ASSERT(pData->curPluginCount > 0);
-        CARLA_ASSERT(id < pData->curPluginCount);
-        CARLA_ASSERT(pData->plugins != nullptr);
-        CARLA_ASSERT(newName != nullptr);
-
-        if (pData->plugins == nullptr)
-        {
-            setLastError("Critical error: no plugins are currently loaded!");
-            return nullptr;
-        }
+        CARLA_SAFE_ASSERT_RETURN(pData->curPluginCount > 0, nullptr);
+        CARLA_SAFE_ASSERT_RETURN(id < pData->curPluginCount, nullptr);
+        CARLA_SAFE_ASSERT_RETURN(pData->plugins != nullptr, nullptr);
+        CARLA_SAFE_ASSERT_RETURN(newName != nullptr && newName[0] != '\0', nullptr);
 
         CarlaPlugin* const plugin(pData->plugins[id].plugin);
 
@@ -787,12 +778,12 @@ public:
             return nullptr;
         }
 
-        CARLA_ASSERT(plugin->getId() == id);
+        CARLA_SAFE_ASSERT(plugin->getId() == id);
 
         bool needsReinit = (pData->options.processMode == ENGINE_PROCESS_MODE_SINGLE_CLIENT);
         const char* name = getUniquePluginName(newName);
 
-        // TODO - use rename port if single-client
+        // TODO - use rename port if single-client and JACK2
 
         // JACK client rename
         if (pData->options.processMode == ENGINE_PROCESS_MODE_MULTIPLE_CLIENTS)
@@ -810,7 +801,7 @@ public:
                 // we should not be able to do this, jack really needs to allow client rename
                 needsReinit = true;
 
-                if (jack_client_t* jclient = jackbridge_client_open(name, JackNullOption, nullptr))
+                if (jack_client_t* const jclient = jackbridge_client_open(name, JackNullOption, nullptr))
                 {
                     //const char* const iconName(plugin->getIconName());
                     //jackbridge_custom_publish_data(jclient, URI_CANVAS_ICON, iconName, std::strlen(iconName)+1);
@@ -858,7 +849,7 @@ public:
 
     bool patchbayConnect(int portA, int portB) override
     {
-        CARLA_ASSERT(fClient != nullptr);
+        CARLA_SAFE_ASSERT_RETURN(fClient != nullptr, false);
 
         if (fClient == nullptr)
         {
@@ -882,17 +873,11 @@ public:
 
     bool patchbayDisconnect(int connectionId) override
     {
-        CARLA_ASSERT(fClient != nullptr);
-
-        if (fClient == nullptr)
-        {
-            setLastError("Invalid JACK client");
-            return false;
-        }
+        CARLA_SAFE_ASSERT_RETURN(fClient != nullptr, false);
 
-        for (List<ConnectionToId>::Itenerator it = fUsedConnections.begin(); it.valid(); it.next())
+        for (LinkedList<ConnectionToId>::Itenerator it = fUsedConnections.begin(); it.valid(); it.next())
         {
-            const ConnectionToId& connectionToId(it.getConstValue());
+            const ConnectionToId& connectionToId(it.getValue());
 
             if (connectionToId.id == connectionId)
             {
@@ -1238,16 +1223,9 @@ protected:
         const char*  const portName(jackbridge_port_short_name(jackPort));
         const char*  const fullPortName(jackbridge_port_name(jackPort));
 
-        CARLA_ASSERT(jackPort != nullptr);
-        CARLA_ASSERT(portName != nullptr);
-        CARLA_ASSERT(fullPortName != nullptr);
-
-        if (jackPort == nullptr)
-            return;
-        if (portName == nullptr)
-            return;
-        if (fullPortName == nullptr)
-            return;
+        CARLA_SAFE_ASSERT_RETURN(jackPort != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(portName != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(fullPortName != nullptr,);
 
         CarlaString groupName(fullPortName);
         groupName.truncate(groupName.rfind(portName)-1);
@@ -1298,11 +1276,8 @@ protected:
         {
             const int portId(getPortId(fullPortName));
 
-            CARLA_ASSERT(groupId != -1);
-            CARLA_ASSERT(portId != -1);
-
-            if (groupId == -1 || portId == -1)
-                return;
+            CARLA_SAFE_ASSERT_RETURN(groupId != -1,);
+            CARLA_SAFE_ASSERT_RETURN(portId != -1,);
 
             PortNameToId portNameId(groupId, portId, portName, fullPortName);
             fUsedPortNames.removeOne(portNameId);
@@ -1318,19 +1293,10 @@ protected:
         const char*  const fullPortNameA(jackbridge_port_name(jackPortA));
         const char*  const fullPortNameB(jackbridge_port_name(jackPortB));
 
-        CARLA_ASSERT(jackPortA != nullptr);
-        CARLA_ASSERT(jackPortB != nullptr);
-        CARLA_ASSERT(fullPortNameA != nullptr);
-        CARLA_ASSERT(fullPortNameB != nullptr);
-
-        if (jackPortA == nullptr)
-            return;
-        if (jackPortB == nullptr)
-            return;
-        if (fullPortNameA == nullptr)
-            return;
-        if (fullPortNameB == nullptr)
-            return;
+        CARLA_SAFE_ASSERT_RETURN(jackPortA != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(jackPortB != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(fullPortNameA != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(fullPortNameB != nullptr,);
 
         const int portIdA(getPortId(fullPortNameA));
         const int portIdB(getPortId(fullPortNameB));
@@ -1347,9 +1313,9 @@ protected:
         }
         else
         {
-            for (List<ConnectionToId>::Itenerator it = fUsedConnections.begin(); it.valid(); it.next())
+            for (LinkedList<ConnectionToId>::Itenerator it = fUsedConnections.begin(); it.valid(); it.next())
             {
-                const ConnectionToId& connectionToId(it.getConstValue());
+                const ConnectionToId& connectionToId(it.getValue());
 
                 if (connectionToId.portOut == portIdA && connectionToId.portIn == portIdB)
                 {
@@ -1363,7 +1329,7 @@ protected:
 
     void handleJackClientRenameCallback(const char* const oldName, const char* const newName)
     {
-        for (List<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
+        for (LinkedList<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
         {
             GroupNameToId& groupNameToId(it.getValue());
 
@@ -1381,31 +1347,23 @@ protected:
         jack_port_t* const jackPort(jackbridge_port_by_id(fClient, port));
         const char*  const portName(jackbridge_port_short_name(jackPort));
 
-        CARLA_ASSERT(jackPort != nullptr);
-        CARLA_ASSERT(portName != nullptr);
-
-        if (jackPort == nullptr)
-            return;
-        if (portName == nullptr)
-            return;
+        CARLA_SAFE_ASSERT_RETURN(jackPort != nullptr,);
+        CARLA_SAFE_ASSERT_RETURN(portName != nullptr,);
 
         CarlaString groupName(newName);
         groupName.truncate(groupName.rfind(portName)-1);
 
         const int groupId(getGroupId(groupName));
 
-        CARLA_ASSERT(groupId != -1);
-
-        if (groupId == -1)
-            return;
+        CARLA_SAFE_ASSERT_RETURN(groupId != -1,);
 
-        for (List<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
+        for (LinkedList<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
         {
             PortNameToId& portNameId(it.getValue());
 
             if (std::strcmp(portNameId.fullName, oldName) == 0)
             {
-                CARLA_ASSERT(portNameId.groupId == groupId);
+                CARLA_SAFE_ASSERT(portNameId.groupId == groupId);
                 portNameId.rename(portName, newName);
                 callback(ENGINE_CALLBACK_PATCHBAY_PORT_RENAMED, groupId, portNameId.portId, 0, 0.0f, newName);
                 break;
@@ -1567,18 +1525,18 @@ private:
     int fLastPortId;
     int fLastConnectionId;
 
-    List<GroupNameToId>  fUsedGroupNames;
-    List<PortNameToId>   fUsedPortNames;
-    List<ConnectionToId> fUsedConnections;
-    //List<int>          fGroupIconsChanged;
+    LinkedList<GroupNameToId>  fUsedGroupNames;
+    LinkedList<PortNameToId>   fUsedPortNames;
+    LinkedList<ConnectionToId> fUsedConnections;
+    //LinkedList<int>          fGroupIconsChanged;
 
     int getGroupId(const char* const name)
     {
         CARLA_SAFE_ASSERT_RETURN(name != nullptr, -1);
 
-        for (List<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
+        for (LinkedList<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
         {
-            const GroupNameToId& groupNameId(it.getConstValue());
+            const GroupNameToId& groupNameId(it.getValue());
 
             if (std::strcmp(groupNameId.name, name) == 0)
                 return groupNameId.id;
@@ -1593,9 +1551,9 @@ private:
 
         CARLA_SAFE_ASSERT_RETURN(groupId >= 0, fallback);
 
-        for (List<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
+        for (LinkedList<GroupNameToId>::Itenerator it = fUsedGroupNames.begin(); it.valid(); it.next())
         {
-            const GroupNameToId& groupNameId(it.getConstValue());
+            const GroupNameToId& groupNameId(it.getValue());
 
             if (groupNameId.id == groupId)
                 return groupNameId.name;
@@ -1608,9 +1566,9 @@ private:
     {
         CARLA_SAFE_ASSERT_RETURN(fullName != nullptr, -1);
 
-        for (List<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
+        for (LinkedList<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
         {
-            const PortNameToId& portNameId(it.getConstValue());
+            const PortNameToId& portNameId(it.getValue());
 
             if (std::strcmp(portNameId.fullName, fullName) == 0)
                 return portNameId.portId;
@@ -1621,9 +1579,9 @@ private:
 
     void getFullPortName(const int portId, char nameBuf[STR_MAX+1])
     {
-        for (List<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
+        for (LinkedList<PortNameToId>::Itenerator it = fUsedPortNames.begin(); it.valid(); it.next())
         {
-            const PortNameToId& portNameId(it.getConstValue());
+            const PortNameToId& portNameId(it.getValue());
 
             if (portNameId.portId == portId)
             {
@@ -1675,14 +1633,14 @@ private:
                 CarlaString groupName(fullPortName);
                 groupName.truncate(groupName.rfind(portName, &found)-1);
 
-                CARLA_ASSERT(found);
+                CARLA_SAFE_ASSERT(found);
 
                 QString qGroupName((const char*)groupName);
 
                 if (parsedGroups.contains(qGroupName))
                 {
                     groupId = getGroupId(groupName);
-                    CARLA_ASSERT(groupId != -1);
+                    CARLA_SAFE_ASSERT(groupId != -1);
                 }
                 else
                 {
diff --git a/source/backend/engine/CarlaEngineJuce.cpp b/source/backend/engine/CarlaEngineJuce.cpp
index efa2a6fdf..0b0cb891e 100644
--- a/source/backend/engine/CarlaEngineJuce.cpp
+++ b/source/backend/engine/CarlaEngineJuce.cpp
@@ -22,7 +22,7 @@
 #include "CarlaEngineInternal.hpp"
 #include "CarlaBackendUtils.hpp"
 
-// #include "RtList.hpp"
+// #include "RtLinkedList.hpp"
 
 #include "juce_audio_devices.h"
 
@@ -321,9 +321,9 @@ public:
         // Connections
         rack->connectLock.lock();
 
-        for (List<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.inCount);
 
             ConnectionToId connectionToId;
@@ -337,9 +337,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.inCount);
 
             ConnectionToId connectionToId;
@@ -353,9 +353,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.outCount);
 
             ConnectionToId connectionToId;
@@ -369,9 +369,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.outCount);
 
             ConnectionToId connectionToId;
@@ -388,9 +388,9 @@ public:
         pData->bufAudio.rack->connectLock.unlock();
 
 #if 0
-        for (List<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
         {
-            const MidiPort& midiPort(it.getConstValue());
+            const MidiPort& midiPort(it.getValue());
 
             ConnectionToId connectionToId;
             connectionToId.id      = rack->lastConnectionId;
@@ -403,9 +403,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
         {
-            const MidiPort& midiPort(it.getConstValue());
+            const MidiPort& midiPort(it.getValue());
 
             ConnectionToId connectionToId;
             connectionToId.id      = rack->lastConnectionId;
diff --git a/source/backend/engine/CarlaEngineRtAudio.cpp b/source/backend/engine/CarlaEngineRtAudio.cpp
index 46b6b72df..c24dfbf6e 100644
--- a/source/backend/engine/CarlaEngineRtAudio.cpp
+++ b/source/backend/engine/CarlaEngineRtAudio.cpp
@@ -17,8 +17,8 @@
 
 #include "CarlaEngineInternal.hpp"
 #include "CarlaBackendUtils.hpp"
-#include "CarlaMIDI.h"
-#include "RtList.hpp"
+
+#include "RtLinkedList.hpp"
 
 #include "rtaudio/RtAudio.h"
 #include "rtmidi/RtMidi.h"
@@ -351,7 +351,7 @@ public:
 
         fDeviceName.clear();
 
-        for (List<MidiPort>::Itenerator it = fMidiIns.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it = fMidiIns.begin(); it.valid(); it.next())
         {
             MidiPort& port(it.getValue());
             RtMidiIn* const midiInPort((RtMidiIn*)port.rtmidi);
@@ -360,7 +360,7 @@ public:
             delete midiInPort;
         }
 
-        for (List<MidiPort>::Itenerator it = fMidiOuts.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it = fMidiOuts.begin(); it.valid(); it.next())
         {
             MidiPort& port(it.getValue());
             RtMidiOut* const midiOutPort((RtMidiOut*)port.rtmidi);
@@ -499,9 +499,9 @@ public:
         // Connections
         rack->connectLock.lock();
 
-        for (List<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.inCount);
 
             ConnectionToId connectionToId;
@@ -515,9 +515,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedIns[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.inCount);
 
             ConnectionToId connectionToId;
@@ -531,9 +531,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[0].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.outCount);
 
             ConnectionToId connectionToId;
@@ -547,9 +547,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
+        for (LinkedList<uint>::Itenerator it = rack->connectedOuts[1].begin(); it.valid(); it.next())
         {
-            const uint& port(it.getConstValue());
+            const uint& port(it.getValue());
             CARLA_SAFE_ASSERT_CONTINUE(port < pData->bufAudio.outCount);
 
             ConnectionToId connectionToId;
@@ -565,9 +565,9 @@ public:
 
         pData->bufAudio.rack->connectLock.unlock();
 
-        for (List<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
         {
-            const MidiPort& midiPort(it.getConstValue());
+            const MidiPort& midiPort(it.getValue());
 
             ConnectionToId connectionToId;
             connectionToId.id      = rack->lastConnectionId;
@@ -580,9 +580,9 @@ public:
             rack->lastConnectionId++;
         }
 
-        for (List<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
         {
-            const MidiPort& midiPort(it.getConstValue());
+            const MidiPort& midiPort(it.getValue());
 
             ConnectionToId connectionToId;
             connectionToId.id      = rack->lastConnectionId;
@@ -839,7 +839,7 @@ protected:
         CARLA_SAFE_ASSERT_RETURN(static_cast<size_t>(portId) < fUsedMidiIns.count(), false);
         carla_debug("CarlaEngineRtAudio::connectRackMidiInPort(%i)", portId);
 
-        for (List<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiOuts.begin(); it.valid(); it.next())
         {
             MidiPort& midiPort(it.getValue());
 
@@ -864,7 +864,7 @@ protected:
         CARLA_SAFE_ASSERT_RETURN(static_cast<size_t>(portId) < fUsedMidiOuts.count(), false);
         carla_debug("CarlaEngineRtAudio::disconnectRackMidiOutPort(%i)", portId);
 
-        for (List<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
+        for (LinkedList<MidiPort>::Itenerator it=fMidiIns.begin(); it.valid(); it.next())
         {
             MidiPort& midiPort(it.getValue());
 
@@ -903,16 +903,16 @@ private:
     RtMidiIn  fDummyMidiIn;
     RtMidiOut fDummyMidiOut;
 
-    List<PortNameToId> fUsedMidiIns;
-    List<PortNameToId> fUsedMidiOuts;
+    LinkedList<PortNameToId> fUsedMidiIns;
+    LinkedList<PortNameToId> fUsedMidiOuts;
 
     struct MidiPort {
         RtMidi* rtmidi;
         int portId;
     };
 
-    List<MidiPort> fMidiIns;
-    List<MidiPort> fMidiOuts;
+    LinkedList<MidiPort> fMidiIns;
+    LinkedList<MidiPort> fMidiOuts;
 
     struct RtMidiEvent {
         uint64_t time; // needs to compare to internal time
@@ -922,9 +922,9 @@ private:
 
     struct RtMidiEvents {
         CarlaMutex mutex;
-        RtList<RtMidiEvent>::Pool dataPool;
-        RtList<RtMidiEvent> data;
-        RtList<RtMidiEvent> dataPending;
+        RtLinkedList<RtMidiEvent>::Pool dataPool;
+        RtLinkedList<RtMidiEvent> data;
+        RtLinkedList<RtMidiEvent> dataPending;
 
         RtMidiEvents()
             : dataPool(512, 512),
@@ -1050,7 +1050,7 @@ const char* const* CarlaEngine::getRtAudioApiDeviceNames(const unsigned int inde
     if (devCount == 0)
         return nullptr;
 
-    List<const char*> devNames;
+    LinkedList<const char*> devNames;
 
     for (unsigned int i=0; i < devCount; ++i)
     {
diff --git a/source/backend/plugin/CarlaPlugin.cpp b/source/backend/plugin/CarlaPlugin.cpp
index 369fb70d2..5bd0fa7e9 100644
--- a/source/backend/plugin/CarlaPlugin.cpp
+++ b/source/backend/plugin/CarlaPlugin.cpp
@@ -582,9 +582,9 @@ const SaveState& CarlaPlugin::getSaveState()
     // ---------------------------------------------------------------
     // Custom Data
 
-    for (List<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
+    for (LinkedList<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
     {
-        const CustomData& cData(it.getConstValue());
+        const CustomData& cData(it.getValue());
 
         StateCustomData* stateCustomData(new StateCustomData());
 
@@ -609,9 +609,9 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
     // ---------------------------------------------------------------
     // Part 1 - PRE-set custom data (only that which reload programs)
 
-    for (List<StateCustomData*>::Itenerator it = saveState.customData.begin(); it.valid(); it.next())
+    for (LinkedList<StateCustomData*>::Itenerator it = saveState.customData.begin(); it.valid(); it.next())
     {
-        const StateCustomData* const stateCustomData(it.getConstValue());
+        const StateCustomData* const stateCustomData(it.getValue());
         const char* const key(stateCustomData->key);
 
         bool wantData = false;
@@ -667,7 +667,7 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
     // ---------------------------------------------------------------
     // Part 4a - get plugin parameter symbols
 
-    List<ParamSymbol*> paramSymbols;
+    LinkedList<ParamSymbol*> paramSymbols;
 
     if (getType() == PLUGIN_LADSPA || getType() == PLUGIN_LV2)
     {
@@ -689,7 +689,7 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
 
     const float sampleRate(static_cast<float>(pData->engine->getSampleRate()));
 
-    for (List<StateParameter*>::Itenerator it = saveState.parameters.begin(); it.valid(); it.next())
+    for (LinkedList<StateParameter*>::Itenerator it = saveState.parameters.begin(); it.valid(); it.next())
     {
         StateParameter* const stateParameter(it.getValue());
 
@@ -700,7 +700,7 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
             // Try to set by symbol, otherwise use index
             if (stateParameter->symbol != nullptr && stateParameter->symbol[0] != '\0')
             {
-                for (List<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
+                for (LinkedList<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
                 {
                     ParamSymbol* const paramSymbol(it.getValue());
 
@@ -721,7 +721,7 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
             // Symbol only
             if (stateParameter->symbol != nullptr && stateParameter->symbol[0] != '\0')
             {
-                for (List<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
+                for (LinkedList<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
                 {
                     ParamSymbol* const paramSymbol(it.getValue());
 
@@ -762,7 +762,7 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
     // ---------------------------------------------------------------
     // Part 4c - clear
 
-    for (List<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
+    for (LinkedList<ParamSymbol*>::Itenerator it = paramSymbols.begin(); it.valid(); it.next())
     {
         ParamSymbol* const paramSymbol(it.getValue());
         delete paramSymbol;
@@ -773,9 +773,9 @@ void CarlaPlugin::loadSaveState(const SaveState& saveState)
     // ---------------------------------------------------------------
     // Part 5 - set custom data
 
-    for (List<StateCustomData*>::Itenerator it = saveState.customData.begin(); it.valid(); it.next())
+    for (LinkedList<StateCustomData*>::Itenerator it = saveState.customData.begin(); it.valid(); it.next())
     {
-        const StateCustomData* const stateCustomData(it.getConstValue());
+        const StateCustomData* const stateCustomData(it.getValue());
         const char* const key(stateCustomData->key);
 
         if (getType() == PLUGIN_DSSI && (std::strcmp(key, "reloadprograms") == 0 || std::strcmp(key, "load") == 0 || std::strncmp(key, "patches", 7) == 0))
@@ -1226,7 +1226,7 @@ void CarlaPlugin::setCustomData(const char* const type, const char* const key, c
         return;
 
     // Check if we already have this key
-    for (List<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
+    for (LinkedList<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
     {
         CustomData& cData(it.getValue());
 
@@ -1682,9 +1682,9 @@ void CarlaPlugin::updateOscData(const lo_address& source, const char* const url)
 
     osc_send_sample_rate(pData->osc.data, static_cast<float>(pData->engine->getSampleRate()));
 
-    for (List<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
+    for (LinkedList<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
     {
-        const CustomData& cData(it.getConstValue());
+        const CustomData& cData(it.getValue());
 
         CARLA_ASSERT(cData.type != nullptr);
         CARLA_ASSERT(cData.key != nullptr);
diff --git a/source/backend/plugin/CarlaPluginInternal.hpp b/source/backend/plugin/CarlaPluginInternal.hpp
index 65e83e776..851e50cdf 100644
--- a/source/backend/plugin/CarlaPluginInternal.hpp
+++ b/source/backend/plugin/CarlaPluginInternal.hpp
@@ -26,7 +26,7 @@
 #include "CarlaOscUtils.hpp"
 #include "CarlaStateUtils.hpp"
 #include "CarlaMutex.hpp"
-#include "RtList.hpp"
+#include "RtLinkedList.hpp"
 
 #ifdef HAVE_JUCE
 # include "juce_audio_basics.h"
@@ -532,7 +532,7 @@ struct CarlaPluginProtectedData {
     PluginParameterData param;
     PluginProgramData prog;
     PluginMidiProgramData midiprog;
-    List<CustomData> custom;
+    LinkedList<CustomData> custom;
 
     SaveState saveState;
 
@@ -541,8 +541,8 @@ struct CarlaPluginProtectedData {
 
     struct ExternalNotes {
         CarlaMutex mutex;
-        RtList<ExternalMidiNote>::Pool dataPool;
-        RtList<ExternalMidiNote> data;
+        RtLinkedList<ExternalMidiNote>::Pool dataPool;
+        RtLinkedList<ExternalMidiNote> data;
 
         ExternalNotes()
             : dataPool(32, 152),
@@ -568,9 +568,9 @@ struct CarlaPluginProtectedData {
 
     struct PostRtEvents {
         CarlaMutex mutex;
-        RtList<PluginPostRtEvent>::Pool dataPool;
-        RtList<PluginPostRtEvent> data;
-        RtList<PluginPostRtEvent> dataPendingRT;
+        RtLinkedList<PluginPostRtEvent>::Pool dataPool;
+        RtLinkedList<PluginPostRtEvent> data;
+        RtLinkedList<PluginPostRtEvent> dataPendingRT;
 
         PostRtEvents()
             : dataPool(128, 128),
@@ -719,7 +719,7 @@ struct CarlaPluginProtectedData {
             client = nullptr;
         }
 
-        for (List<CustomData>::Itenerator it = custom.begin(); it.valid(); it.next())
+        for (LinkedList<CustomData>::Itenerator it = custom.begin(); it.valid(); it.next())
         {
             CustomData& cData(it.getValue());
 
diff --git a/source/backend/plugin/DssiPlugin.cpp b/source/backend/plugin/DssiPlugin.cpp
index bce36a32b..5b81b3310 100644
--- a/source/backend/plugin/DssiPlugin.cpp
+++ b/source/backend/plugin/DssiPlugin.cpp
@@ -74,7 +74,7 @@ public:
 
         if (fDescriptor != nullptr)
         {
-            if (pData->name.isNotEmpty() && fDssiDescriptor != nullptr && fDssiDescriptor->run_synth == nullptr && fDssiDescriptor->run_multiple_synths != nullptr)
+            if (pData->name != nullptr && fDssiDescriptor != nullptr && fDssiDescriptor->run_synth == nullptr && fDssiDescriptor->run_multiple_synths != nullptr)
                 removeUniqueMultiSynth(fDescriptor->Label);
 
             if (fDescriptor->cleanup != nullptr)
@@ -156,8 +156,13 @@ public:
 
     unsigned int getOptionsAvailable() const override
     {
-        const bool isAmSynth = pData->filename.contains("amsynth", true);
-        const bool isDssiVst = pData->filename.contains("dssi-vst", true);
+#ifdef __USE_GNU
+        const bool isAmSynth(strcasestr(pData->filename, "amsynth"));
+        const bool isDssiVst(strcasestr(pData->filename, "dssi-vst"));
+#else
+        const bool isAmSynth(std::strstr(pData->filename, "amsynth"));
+        const bool isDssiVst(std::strstr(pData->filename, "dssi-vst"));
+#endif
 
         unsigned int options = 0x0;
 
@@ -318,18 +323,12 @@ public:
         CARLA_SAFE_ASSERT_RETURN(fHandle2 == nullptr,);
         CARLA_SAFE_ASSERT_RETURN(stringData != nullptr,);
 
-        // TODO
-#if 0
         QByteArray chunk(QByteArray::fromBase64(stringData));
 
-        CARLA_ASSERT(chunk.size() > 0);
+        CARLA_SAFE_ASSERT_RETURN(chunk.size() > 0,);
 
-        if (chunk.size() > 0)
-        {
-            const ScopedSingleProcessLocker spl(this, true);
-            fDssiDescriptor->set_custom_data(fHandle, chunk.data(), chunk.size());
-        }
-#endif
+        const ScopedSingleProcessLocker spl(this, true);
+        fDssiDescriptor->set_custom_data(fHandle, chunk.data(), chunk.size());
     }
 
     void setMidiProgram(int32_t index, const bool sendGui, const bool sendOsc, const bool sendCallback) override
@@ -483,10 +482,7 @@ public:
             pData->param.createNew(params);
 
             fParamBuffers = new float[params];
-#ifdef HAVE_JUCE
-            FloatVectorOperations::clear(fParamBuffers, params);
-#else
-#endif
+            FLOAT_CLEAR(fParamBuffers, params);
         }
 
         const uint portNameSize(pData->engine->getMaxPortNameSize());
@@ -615,7 +611,7 @@ public:
 
                 if (LADSPA_IS_PORT_INPUT(portType))
                 {
-                    pData->param.data[j].hints |= PARAMETER_IS_INPUT;
+                    pData->param.data[j].type   = PARAMETER_INPUT;
                     pData->param.data[j].hints |= PARAMETER_IS_ENABLED;
                     pData->param.data[j].hints |= PARAMETER_IS_AUTOMABLE;
                     needsCtrlIn = true;
@@ -643,8 +639,8 @@ public:
                         stepSmall = 1.0f;
                         stepLarge = 1.0f;
 
-                        //pData->param.data[j].type  = PARAMETER_LATENCY;
-                        pData->param.data[j].hints = 0;
+                        pData->param.data[j].type  = PARAMETER_SPECIAL;
+                        pData->param.data[j].hints = 0; // TODO PARAMETER_LATENCY
                     }
                     else if (std::strcmp(fDescriptor->PortNames[i], "_sample-rate") == 0)
                     {
@@ -653,11 +649,12 @@ public:
                         stepSmall = 1.0f;
                         stepLarge = 1.0f;
 
-                        //pData->param.data[j].type  = PARAMETER_SAMPLE_RATE;
-                        pData->param.data[j].hints = 0;
+                        pData->param.data[j].type  = PARAMETER_SPECIAL;
+                        pData->param.data[j].hints = 0; // TODO PARAMETER_SAMPLE_RATE
                     }
                     else
                     {
+                        pData->param.data[j].type   = PARAMETER_OUTPUT;
                         pData->param.data[j].hints |= PARAMETER_IS_ENABLED;
                         pData->param.data[j].hints |= PARAMETER_IS_AUTOMABLE;
                         needsCtrlOut = true;
@@ -665,6 +662,7 @@ public:
                 }
                 else
                 {
+                    pData->param.data[j].type = PARAMETER_UNKNOWN;
                     carla_stderr2("WARNING - Got a broken Port (Control, but not input or output)");
                 }
 
@@ -954,13 +952,7 @@ public:
         {
             // disable any output sound
             for (uint32_t i=0; i < pData->audioOut.count; ++i)
-            {
-#ifdef HAVE_JUCE
-                FloatVectorOperations::clear(outBuffer[i], frames);
-#else
-#endif
-            }
-
+                FLOAT_CLEAR(outBuffer[i], frames);
             return;
         }
 
@@ -1003,12 +995,7 @@ public:
             if (pData->latency > 0)
             {
                 for (uint32_t i=0; i < pData->audioIn.count; ++i)
-                {
-#ifdef HAVE_JUCE
-                    FloatVectorOperations::clear(pData->latencyBuffers[i], pData->latency);
-#else
-#endif
-                }
+                    FLOAT_CLEAR(pData->latencyBuffers[i], pData->latency);
             }
 
             pData->needsReset = false;
@@ -1161,7 +1148,7 @@ public:
                                 continue;
                             if (pData->param.data[k].midiCC != ctrlEvent.param)
                                 continue;
-                            if ((pData->param.data[k].hints & PARAMETER_IS_INPUT) == 0)
+                            if (pData->param.data[k].type != PARAMETER_INPUT)
                                 continue;
                             if ((pData->param.data[k].hints & PARAMETER_IS_AUTOMABLE) == 0)
                                 continue;
@@ -1197,7 +1184,7 @@ public:
                             midiEvent.type = SND_SEQ_EVENT_CONTROLLER;
                             midiEvent.data.control.channel = event.channel;
                             midiEvent.data.control.param   = ctrlEvent.param;
-                            midiEvent.data.control.value   = ctrlEvent.value*127.0f;
+                            midiEvent.data.control.value   = int8_t(ctrlEvent.value*127.0f);
                         }
 
                         break;
@@ -1283,7 +1270,7 @@ public:
 
                     // Fix bad note-off (per DSSI spec)
                     if (MIDI_IS_STATUS_NOTE_ON(status) && engineEvent.data[2] == 0)
-                        status -= 0x10;
+                        status = MIDI_STATUS_NOTE_OFF;
 
                     snd_seq_event_t& midiEvent(fMidiEvents[midiEventCount]);
                     carla_zeroStruct<snd_seq_event_t>(midiEvent);
@@ -1409,14 +1396,16 @@ public:
 
             for (uint32_t k=0; k < pData->param.count; ++k)
             {
-                if (pData->param.data[k].hints & PARAMETER_IS_INPUT)
+                if (pData->param.data[k].type != PARAMETER_OUTPUT)
                     continue;
 
+                pData->param.ranges[k].fixValue(fParamBuffers[k]);
+
                 if (pData->param.data[k].midiCC > 0)
                 {
                     channel = pData->param.data[k].midiChannel;
                     param   = static_cast<uint16_t>(pData->param.data[k].midiCC);
-                    value   = pData->param.ranges[k].getFixedAndNormalizedValue(fParamBuffers[k]);
+                    value   = pData->param.ranges[k].getNormalizedValue(fParamBuffers[k]);
                     pData->event.portOut->writeControlEvent(0, channel, kEngineControlEventTypeParameter, param, value);
                 }
             }
@@ -1459,20 +1448,10 @@ public:
         // Reset audio buffers
 
         for (uint32_t i=0; i < pData->audioIn.count; ++i)
-        {
-#ifdef HAVE_JUCE
-            FloatVectorOperations::copy(fAudioInBuffers[i], inBuffer[i]+timeOffset, frames);
-#else
-#endif
-        }
+            FLOAT_COPY(fAudioInBuffers[i], inBuffer[i]+timeOffset, frames);
 
         for (uint32_t i=0; i < pData->audioOut.count; ++i)
-        {
-#ifdef HAVE_JUCE
-            FloatVectorOperations::clear(fAudioOutBuffers[i], frames);
-#else
-#endif
-        }
+            FLOAT_CLEAR(fAudioOutBuffers[i], frames);
 
         // --------------------------------------------------------------------------------------------------------
         // Run plugin
@@ -1537,10 +1516,7 @@ public:
                     if (isPair)
                     {
                         CARLA_ASSERT(i+1 < pData->audioOut.count);
-#ifdef HAVE_JUCE
-                        FloatVectorOperations::copy(oldBufLeft, fAudioOutBuffers[i], frames);
-#else
-#endif
+                        FLOAT_COPY(oldBufLeft, fAudioOutBuffers[i], frames);
                     }
 
                     float balRangeL = (pData->postProc.balanceLeft  + 1.0f)/2.0f;
@@ -1655,7 +1631,7 @@ public:
 
     void sampleRateChanged(const double newSampleRate) override
     {
-        CARLA_ASSERT_INT(newSampleRate > 0.0, newSampleRate);
+        CARLA_ASSERT_INT(newSampleRate > 0.0, (int)newSampleRate);
         carla_debug("DssiPlugin::sampleRateChanged(%g) - start", newSampleRate);
 
         // TODO
@@ -1865,10 +1841,7 @@ public:
         else
             pData->name = pData->engine->getUniquePluginName(fDescriptor->Label);
 
-        pData->filename = filename;
-
-        CARLA_ASSERT(pData->name.isNotEmpty());
-        CARLA_ASSERT(pData->filename.isNotEmpty());
+        pData->filename = carla_strdup(filename);
 
         // ---------------------------------------------------------------
         // register client
@@ -1909,18 +1882,23 @@ public:
         // ---------------------------------------------------------------
         // gui stuff
 
-        //if (const char* const guiFilename = find_dssi_ui(filename, fDescriptor->Label))
+        if (const char* const guiFilename = find_dssi_ui(filename, fDescriptor->Label))
         {
-            //pData->osc.thread.setOscData(guiFilename, fDescriptor->Label);
-            //fGuiFilename = guiFilename;
+            pData->osc.thread.setOscData(guiFilename, fDescriptor->Label);
+            fGuiFilename = guiFilename;
         }
 
         // ---------------------------------------------------------------
         // load plugin settings
 
         {
-            const bool isAmSynth = pData->filename.contains("amsynth", true);
-            const bool isDssiVst = pData->filename.contains("dssi-vst", true);
+#ifdef __USE_GNU
+            const bool isAmSynth(strcasestr(pData->filename, "amsynth"));
+            const bool isDssiVst(strcasestr(pData->filename, "dssi-vst"));
+#else
+            const bool isAmSynth(std::strstr(pData->filename, "amsynth"));
+            const bool isDssiVst(std::strstr(pData->filename, "dssi-vst"));
+#endif
 
             // set default options
             pData->options = 0x0;
@@ -1947,11 +1925,19 @@ public:
                     carla_stderr2("WARNING: Plugin can ONLY use run_multiple_synths!");
             }
 
+            // set identifier string
+            CarlaString identifier("DSSI/");
+
+            if (const char* const shortname = std::strrchr(filename, OS_SEP))
+            {
+                identifier += shortname+1;
+                identifier += ",";
+            }
+
+            identifier += label;
+            pData->identifier = identifier.dup();
+
             // load settings
-            pData->idStr  = "DSSI/";
-            pData->idStr += std::strrchr(filename, OS_SEP)+1;
-            pData->idStr += "/";
-            pData->idStr += label;
             pData->options = pData->loadSettings(pData->options, getOptionsAvailable());
 
             // ignore settings, we need this anyway
@@ -1976,15 +1962,15 @@ private:
     float*  fParamBuffers;
     snd_seq_event_t fMidiEvents[kPluginMaxMidiEvents];
 
-    static List<const char*> sMultiSynthList;
+    static LinkedList<const char*> sMultiSynthList;
 
     static bool addUniqueMultiSynth(const char* const label)
     {
         CARLA_SAFE_ASSERT_RETURN(label != nullptr, true);
 
-        for (List<const char*>::Itenerator it = sMultiSynthList.begin(); it.valid(); it.next())
+        for (LinkedList<const char*>::Itenerator it = sMultiSynthList.begin(); it.valid(); it.next())
         {
-            const char*& itLabel(*it);
+            const char*& itLabel(it.getValue());
 
             if (std::strcmp(label, itLabel) == 0)
                 return false;
@@ -1998,9 +1984,9 @@ private:
     {
         CARLA_SAFE_ASSERT_RETURN(label != nullptr,);
 
-        for (List<const char*>::Itenerator it = sMultiSynthList.begin(); it.valid(); it.next())
+        for (LinkedList<const char*>::Itenerator it = sMultiSynthList.begin(); it.valid(); it.next())
         {
-            const char*& itLabel(*it);
+            const char*& itLabel(it.getValue());
 
             if (std::strcmp(label, itLabel) == 0)
             {
@@ -2014,7 +2000,7 @@ private:
     CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(DssiPlugin)
 };
 
-List<const char*> DssiPlugin::sMultiSynthList;
+LinkedList<const char*> DssiPlugin::sMultiSynthList;
 
 CARLA_BACKEND_END_NAMESPACE
 
diff --git a/source/backend/plugin/FluidSynthPlugin.cpp b/source/backend/plugin/FluidSynthPlugin.cpp
index 704b5cd0b..3d4b56e70 100644
--- a/source/backend/plugin/FluidSynthPlugin.cpp
+++ b/source/backend/plugin/FluidSynthPlugin.cpp
@@ -1130,21 +1130,21 @@ public:
                         {
                             float value;
 
-                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) > 0)
+                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) != 0)
                             {
                                 value = ctrlEvent.value;
                                 setDryWet(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_DRYWET, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) > 0)
+                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) != 0)
                             {
                                 value = ctrlEvent.value*127.0f/100.0f;
                                 setVolume(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_VOLUME, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) > 0)
+                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) != 0)
                             {
                                 float left, right;
                                 value = ctrlEvent.value/0.5f - 1.0f;
@@ -1613,7 +1613,12 @@ public:
 
             // set identifier string
             CarlaString identifier("SF2/");
-            identifier += label;
+
+            if (const char* const shortname = std::strrchr(filename, OS_SEP))
+                identifier += shortname+1;
+            else
+                identifier += label;
+
             pData->identifier = identifier.dup();
 
             // load settings
diff --git a/source/backend/plugin/LadspaPlugin.cpp b/source/backend/plugin/LadspaPlugin.cpp
index 96d3fd78a..5f66d39f1 100644
--- a/source/backend/plugin/LadspaPlugin.cpp
+++ b/source/backend/plugin/LadspaPlugin.cpp
@@ -915,7 +915,7 @@ public:
 
                 case kEngineEventTypeControl:
                 {
-                    const EngineControlEvent& ctrlEvent = event.ctrl;
+                    const EngineControlEvent& ctrlEvent(event.ctrl);
 
                     switch (ctrlEvent.type)
                     {
@@ -930,21 +930,21 @@ public:
                         {
                             float value;
 
-                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) > 0)
+                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) != 0)
                             {
                                 value = ctrlEvent.value;
                                 setDryWet(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_DRYWET, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) > 0)
+                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) != 0)
                             {
                                 value = ctrlEvent.value*127.0f/100.0f;
                                 setVolume(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_VOLUME, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) > 0)
+                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) != 0)
                             {
                                 float left, right;
                                 value = ctrlEvent.value/0.5f - 1.0f;
diff --git a/source/backend/plugin/LinuxSamplerPlugin.cpp b/source/backend/plugin/LinuxSamplerPlugin.cpp
index 28edfb3cd..1578074d6 100644
--- a/source/backend/plugin/LinuxSamplerPlugin.cpp
+++ b/source/backend/plugin/LinuxSamplerPlugin.cpp
@@ -71,7 +71,7 @@ public:
 
     uint SampleRate() override
     {
-        return fEngine->getSampleRate();
+        return (uint)fEngine->getSampleRate();
     }
 
     String Driver() override
@@ -126,7 +126,7 @@ public:
 
     MidiInputPort* CreateMidiPort() override
     {
-        return new MidiInputPortPlugin(this, Ports.size());
+        return new MidiInputPortPlugin(this, (int)Ports.size());
     }
 
     // -------------------------------------------------------------------
@@ -163,7 +163,7 @@ CARLA_BACKEND_START_NAMESPACE
 class LinuxSamplerPlugin : public CarlaPlugin
 {
 public:
-    LinuxSamplerPlugin(CarlaEngine* const engine, const unsigned short id, const bool isGIG, const bool use16Outs)
+    LinuxSamplerPlugin(CarlaEngine* const engine, const unsigned int id, const bool isGIG, const bool use16Outs)
         : CarlaPlugin(engine, id),
           kIsGIG(isGIG),
           kUses16Outs(use16Outs),
@@ -434,13 +434,10 @@ public:
         pData->midiprog.clear();
 
         // Query new programs
-        uint32_t i, count = fInstrumentIds.size();
+        uint32_t i, count = (uint32_t)fInstrumentIds.size();
 
         // sound kits must always have at least 1 midi-program
-        CARLA_ASSERT(count > 0);
-
-        if (count == 0)
-            return;
+        CARLA_SAFE_ASSERT_RETURN(count > 0,);
 
         pData->midiprog.createNew(count);
 
@@ -536,8 +533,8 @@ public:
             }
             else if (pData->ctrlChannel >= 0 && pData->ctrlChannel < MAX_MIDI_CHANNELS)
             {
-                for (k=0; k < MAX_MIDI_NOTE; ++k)
-                    fMidiInputPort->DispatchNoteOff(k, 0, pData->ctrlChannel);
+                for (uint8_t i=0; i < MAX_MIDI_NOTE; ++i)
+                    fMidiInputPort->DispatchNoteOff(i, 0, (uint)pData->ctrlChannel);
             }
 
             pData->needsReset = false;
@@ -632,21 +629,21 @@ public:
                         {
                             float value;
 
-                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) > 0)
+                            if (MIDI_IS_CONTROL_BREATH_CONTROLLER(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_DRYWET) != 0)
                             {
                                 value = ctrlEvent.value;
                                 setDryWet(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_DRYWET, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) > 0)
+                            if (MIDI_IS_CONTROL_CHANNEL_VOLUME(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_VOLUME) != 0)
                             {
                                 value = ctrlEvent.value*127.0f/100.0f;
                                 setVolume(value, false, false);
                                 pData->postponeRtEvent(kPluginPostRtEventParameterChange, PARAMETER_VOLUME, 0, value);
                             }
 
-                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) > 0)
+                            if (MIDI_IS_CONTROL_BALANCE(ctrlEvent.param) && (pData->hints & PLUGIN_CAN_BALANCE) != 0)
                             {
                                 float left, right;
                                 value = ctrlEvent.value/0.5f - 1.0f;
@@ -682,12 +679,12 @@ public:
                                 continue;
                             if (pData->param.data[k].midiCC != ctrlEvent.param)
                                 continue;
-                            if ((pData->param.data[k].hints & PARAMETER_IS_INPUT) == 0)
+                            if (pData->param.data[k].hints != PARAMETER_INPUT)
                                 continue;
                             if ((pData->param.data[k].hints & PARAMETER_IS_AUTOMABLE) == 0)
                                 continue;
 
-                            double value;
+                            float value;
 
                             if (pData->param.data[k].hints & PARAMETER_IS_BOOLEAN)
                             {
@@ -707,7 +704,7 @@ public:
 
                         if ((pData->options & PLUGIN_OPTION_SEND_CONTROL_CHANGES) != 0 && ctrlEvent.param <= 0x5F)
                         {
-                            fMidiInputPort->DispatchControlChange(ctrlEvent.param, ctrlEvent.value*127.0f, event.channel, sampleAccurate ? startTime : time);
+                            fMidiInputPort->DispatchControlChange(uint8_t(ctrlEvent.param), uint8_t(ctrlEvent.value*127.0f), event.channel, int32_t(sampleAccurate ? startTime : time));
                         }
 
                         break;
@@ -768,7 +765,7 @@ public:
 
                     // Fix bad note-off (per DSSI spec)
                     if (MIDI_IS_STATUS_NOTE_ON(status) && midiEvent.data[2] == 0)
-                        status -= 0x10;
+                        status = MIDI_STATUS_NOTE_OFF;
 
                     int32_t fragmentPos = sampleAccurate ? startTime : time;
 
@@ -1100,10 +1097,17 @@ public:
             pData->options |= PLUGIN_OPTION_SEND_PITCHBEND;
             pData->options |= PLUGIN_OPTION_SEND_ALL_SOUND_OFF;
 
+            // set identifier string
+            CarlaString identifier(kIsGIG ? "GIG/" : "SFZ/");
+
+            if (const char* const shortname = std::strrchr(filename, OS_SEP))
+                identifier += shortname+1;
+            else
+                identifier += label;
+
+            pData->identifier = identifier.dup();
+
             // load settings
-            pData->idStr  = kIsGIG ? "GIG" : "SFZ";
-            pData->idStr += "/";
-            pData->idStr += label;
             pData->options = pData->loadSettings(pData->options, getOptionsAvailable());
         }
 
diff --git a/source/backend/plugin/Lv2Plugin.cpp b/source/backend/plugin/Lv2Plugin.cpp
index 9e6ea8d0c..511722f78 100644
--- a/source/backend/plugin/Lv2Plugin.cpp
+++ b/source/backend/plugin/Lv2Plugin.cpp
@@ -141,6 +141,7 @@ enum Lv2PluginGuiType {
     PLUGIN_UI_EXTERNAL
 };
 
+#if 0
 struct Lv2EventData {
     uint32_t type;
     uint32_t rindex;
@@ -5408,6 +5409,7 @@ private:
 };
 
 // -------------------------------------------------------------------------------------------------------------------
+#endif
 
 #define lv2PluginPtr ((Lv2Plugin*)plugin)
 
@@ -5417,7 +5419,7 @@ int CarlaEngineOsc::handleMsgLv2AtomTransfer(CARLA_ENGINE_OSC_HANDLE_ARGS2)
     carla_debug("CarlaOsc::handleMsgLv2AtomTransfer()");
 
     const int32_t portIndex   = argv[0]->i;
-    const char* const atomBuf = (const char*)&argv[1]->s;
+    //const char* const atomBuf = (const char*)&argv[1]->s;
 
     if (portIndex < 0)
         return 0;
@@ -5428,6 +5430,9 @@ int CarlaEngineOsc::handleMsgLv2AtomTransfer(CARLA_ENGINE_OSC_HANDLE_ARGS2)
 //     LV2_Atom* const atom = (LV2_Atom*)chunk.data();
 //     lv2PluginPtr->handleTransferAtom(portIndex, atom);
     return 0;
+
+    // unused for now
+    (void)plugin;
 }
 
 int CarlaEngineOsc::handleMsgLv2UridMap(CARLA_ENGINE_OSC_HANDLE_ARGS2)
@@ -5436,13 +5441,16 @@ int CarlaEngineOsc::handleMsgLv2UridMap(CARLA_ENGINE_OSC_HANDLE_ARGS2)
     carla_debug("CarlaOsc::handleMsgLv2EventTransfer()");
 
     const int32_t urid    = argv[0]->i;
-    const char* const uri = (const char*)&argv[1]->s;
+    //const char* const uri = (const char*)&argv[1]->s;
 
     if (urid <= 0)
         return 0;
 
-    lv2PluginPtr->handleUridMap(urid, uri);
+    //lv2PluginPtr->handleUridMap(urid, uri);
     return 0;
+
+    // unused for now
+    (void)plugin;
 }
 
 #undef lv2PluginPtr
@@ -5457,7 +5465,7 @@ CarlaPlugin* CarlaPlugin::newLV2(const Initializer& init)
 {
     carla_debug("CarlaPlugin::newLV2({%p, \"%s\", \"%s\"})", init.engine, init.name, init.label);
 
-#ifdef WANT_LV2
+#if 0 //def WANT_LV2
     Lv2Plugin* const plugin(new Lv2Plugin(init.engine, init.id));
 
     if (! plugin->init(init.name, init.label))
diff --git a/source/backend/plugin/NativePlugin.cpp b/source/backend/plugin/NativePlugin.cpp
index c6fd44b1d..0ca6a93a6 100644
--- a/source/backend/plugin/NativePlugin.cpp
+++ b/source/backend/plugin/NativePlugin.cpp
@@ -643,9 +643,9 @@ public:
 
         if (fDescriptor->ui_set_custom_data != nullptr)
         {
-            for (List<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
+            for (LinkedList<CustomData>::Itenerator it = pData->custom.begin(); it.valid(); it.next())
             {
-                const CustomData& cData(it.getConstValue());
+                const CustomData& cData(it.getValue());
 
                 if (std::strcmp(cData.type, CUSTOM_DATA_TYPE_STRING) == 0 && std::strcmp(cData.key, "midiPrograms") != 0)
                     fDescriptor->ui_set_custom_data(fHandle, cData.key, cData.value);
@@ -2196,9 +2196,9 @@ public:
         // ---------------------------------------------------------------
         // get descriptor that matches label
 
-        for (List<const NativePluginDescriptor*>::Itenerator it = sPluginDescriptors.begin(); it.valid(); it.next())
+        for (LinkedList<const NativePluginDescriptor*>::Itenerator it = sPluginDescriptors.begin(); it.valid(); it.next())
         {
-            fDescriptor = it.getConstValue();
+            fDescriptor = it.getValue();
 
             CARLA_SAFE_ASSERT_BREAK(fDescriptor != nullptr);
 
@@ -2357,7 +2357,7 @@ private:
 
     NativeTimeInfo fTimeInfo;
 
-    static List<const NativePluginDescriptor*> sPluginDescriptors;
+    static LinkedList<const NativePluginDescriptor*> sPluginDescriptors;
 
     // -------------------------------------------------------------------
 
@@ -2423,7 +2423,7 @@ private:
     CARLA_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(NativePlugin)
 };
 
-List<const NativePluginDescriptor*> NativePlugin::sPluginDescriptors;
+LinkedList<const NativePluginDescriptor*> NativePlugin::sPluginDescriptors;
 
 static const NativePlugin::ScopedInitializer _si;
 
diff --git a/source/modules/carla_native/midi-base.hpp b/source/modules/carla_native/midi-base.hpp
index 973ba63b3..710be589d 100644
--- a/source/modules/carla_native/midi-base.hpp
+++ b/source/modules/carla_native/midi-base.hpp
@@ -20,7 +20,7 @@
 
 #include "CarlaMIDI.h"
 #include "CarlaMutex.hpp"
-#include "List.hpp"
+#include "LinkedList.hpp"
 
 #define MAX_EVENT_DATA_SIZE          4
 #define MIN_PREALLOCATED_EVENT_COUNT 100
@@ -59,7 +59,7 @@ public:
 
     ~MidiPattern()
     {
-        fData.clear_const();
+        fData.clear();
     }
 
     void addControl(const uint64_t time, const uint8_t channel, const uint8_t control, const uint8_t value)
@@ -174,9 +174,9 @@ public:
         if (! fMutex.tryLock())
             return;
 
-        for (List<const RawMidiEvent*>::Itenerator it = fData.begin(); it.valid(); it.next())
+        for (LinkedList<const RawMidiEvent*>::Itenerator it = fData.begin(); it.valid(); it.next())
         {
-            const RawMidiEvent* const rawMidiEvent(it.getConstValue());
+            const RawMidiEvent* const rawMidiEvent(it.getValue());
 
             if (timePosFrame > rawMidiEvent->time)
                 continue;
@@ -192,7 +192,7 @@ public:
     void clear()
     {
         const CarlaMutex::ScopedLocker sl(fMutex);
-        fData.clear_const();
+        fData.clear();
     }
 
 private:
@@ -202,7 +202,7 @@ private:
     uint32_t fDuration;  // unused
 
     CarlaMutex fMutex;
-    List<const RawMidiEvent*> fData;
+    LinkedList<const RawMidiEvent*> fData;
 
     void append(const RawMidiEvent* const event)
     {
@@ -213,9 +213,9 @@ private:
             return;
         }
 
-        for (List<const RawMidiEvent*>::Itenerator it = fData.begin(); it.valid(); it.next())
+        for (LinkedList<const RawMidiEvent*>::Itenerator it = fData.begin(); it.valid(); it.next())
         {
-            const RawMidiEvent* const oldEvent(it.getConstValue());
+            const RawMidiEvent* const oldEvent(it.getValue());
 
             if (event->time >= oldEvent->time)
                 continue;
diff --git a/source/modules/carla_native/zynaddsubfx-synth.cpp b/source/modules/carla_native/zynaddsubfx-synth.cpp
index 03cddbb69..a8e2b8406 100644
--- a/source/modules/carla_native/zynaddsubfx-synth.cpp
+++ b/source/modules/carla_native/zynaddsubfx-synth.cpp
@@ -22,7 +22,7 @@
 #include "CarlaNative.hpp"
 #include "CarlaMIDI.h"
 #include "CarlaThread.hpp"
-#include "List.hpp"
+#include "LinkedList.hpp"
 
 #include "zynaddsubfx/DSP/FFTwrapper.h"
 #include "zynaddsubfx/Misc/Master.h"
@@ -92,7 +92,7 @@ public:
 
         for (auto it = fPrograms.begin(); it.valid(); it.next())
         {
-            const ProgramInfo* const& pInfo(it.getConstValue());
+            const ProgramInfo* const& pInfo(it.getValue());
             delete pInfo;
         }
 
@@ -219,7 +219,7 @@ private:
 
     bool fInitiated;
     NativeMidiProgram fRetProgram;
-    List<const ProgramInfo*> fPrograms;
+    LinkedList<const ProgramInfo*> fPrograms;
 
     CARLA_DECLARE_NON_COPY_CLASS(ZynAddSubFxPrograms)
 };
diff --git a/source/plugin/Makefile b/source/plugin/Makefile
index e8b9c8a39..f659d47b8 100644
--- a/source/plugin/Makefile
+++ b/source/plugin/Makefile
@@ -46,12 +46,9 @@ ifeq ($(HAVE_FLUIDSYNTH),true)
 LINK_FLAGS += $(FLUIDSYNTH_LIBS)
 endif
 
-# ifeq ($(HAVE_LINUXSAMPLER),true)
-# LINK_FLAGS += $(shell pkg-config --libs linuxsampler)
-# ifeq ($(WIN32),true)
-# LINK_FLAGS += lrpcrt4
-# endif
-# endif
+ifeq ($(HAVE_LINUXSAMPLER),true)
+LINK_FLAGS += $(LINUXSAMPLER_LIBS)
+endif
 
 # --------------------------------------------------------------
 # Coomon
diff --git a/source/plugin/carla-native-base.cpp b/source/plugin/carla-native-base.cpp
index 013e9a7ce..5a5ca791b 100644
--- a/source/plugin/carla-native-base.cpp
+++ b/source/plugin/carla-native-base.cpp
@@ -21,12 +21,7 @@
 #include "CarlaNative.h"
 
 #include "CarlaBackendUtils.hpp"
-#include "List.hpp"
-
-// TODO: remove
-#ifndef CARLA_NATIVE_PLUGIN_LV2
-# define CARLA_NATIVE_PLUGIN_LV2
-#endif
+#include "LinkedList.hpp"
 
 #ifdef CARLA_NATIVE_PLUGIN_LV2
 # include "lv2/lv2.h"
@@ -71,7 +66,7 @@ struct PluginListManager {
     ~PluginListManager()
     {
 #ifdef CARLA_NATIVE_PLUGIN_LV2
-        for (List<const LV2_Descriptor*>::Itenerator it = lv2Descs.begin(); it.valid(); it.next())
+        for (LinkedList<const LV2_Descriptor*>::Itenerator it = lv2Descs.begin(); it.valid(); it.next())
         {
             const LV2_Descriptor*& lv2Desc(it.getValue());
             delete[] lv2Desc->URI;
@@ -90,9 +85,9 @@ struct PluginListManager {
     }
 
 #ifdef CARLA_NATIVE_PLUGIN_LV2
-    List<const LV2_Descriptor*> lv2Descs;
+    LinkedList<const LV2_Descriptor*> lv2Descs;
 #endif
-    List<const NativePluginDescriptor*> descs;
+    LinkedList<const NativePluginDescriptor*> descs;
 };
 
 // -----------------------------------------------------------------------
diff --git a/source/plugin/carla-native-lv2-export.cpp b/source/plugin/carla-native-lv2-export.cpp
index 02e24d2dc..d10294cec 100644
--- a/source/plugin/carla-native-lv2-export.cpp
+++ b/source/plugin/carla-native-lv2-export.cpp
@@ -114,9 +114,9 @@ void writeManifestFile(PluginListManager& plm)
     // -------------------------------------------------------------------
     // Plugins
 
-    for (List<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
+    for (LinkedList<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
     {
-        const NativePluginDescriptor* const& pluginDesc(it.getConstValue());
+        const NativePluginDescriptor* const& pluginDesc(it.getValue());
         const String label(pluginDesc->label);
 
         if (label == "carla")
@@ -566,9 +566,9 @@ int main()
 
     writeManifestFile(plm);
 
-    for (List<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
+    for (LinkedList<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
     {
-        const NativePluginDescriptor* const& pluginDesc(it.getConstValue());
+        const NativePluginDescriptor* const& pluginDesc(it.getValue());
         writePluginFile(pluginDesc);
     }
 
diff --git a/source/plugin/carla-native-lv2.cpp b/source/plugin/carla-native-lv2.cpp
index 56f233cee..a3b690000 100644
--- a/source/plugin/carla-native-lv2.cpp
+++ b/source/plugin/carla-native-lv2.cpp
@@ -1194,9 +1194,9 @@ static LV2_Handle lv2_instantiate(const LV2_Descriptor* lv2Descriptor, double sa
 
     PluginListManager& plm(PluginListManager::getInstance());
 
-    for (List<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
+    for (LinkedList<const NativePluginDescriptor*>::Itenerator it = plm.descs.begin(); it.valid(); it.next())
     {
-        const NativePluginDescriptor* const& tmpDesc(it.getConstValue());
+        const NativePluginDescriptor* const& tmpDesc(it.getValue());
 
         if (std::strcmp(tmpDesc->label, pluginLabel) == 0)
         {
diff --git a/source/utils/CarlaLibCounter.hpp b/source/utils/CarlaLibCounter.hpp
index dae2d6459..09eb94395 100644
--- a/source/utils/CarlaLibCounter.hpp
+++ b/source/utils/CarlaLibCounter.hpp
@@ -20,7 +20,7 @@
 
 #include "CarlaLibUtils.hpp"
 #include "CarlaMutex.hpp"
-#include "List.hpp"
+#include "LinkedList.hpp"
 
 // -----------------------------------------------------------------------
 
@@ -35,7 +35,7 @@ public:
 
         const CarlaMutex::ScopedLocker sl(fMutex);
 
-        for (List<Lib>::Itenerator it = fLibs.begin(); it.valid(); it.next())
+        for (LinkedList<Lib>::Itenerator it = fLibs.begin(); it.valid(); it.next())
         {
             Lib& lib(it.getValue());
             CARLA_ASSERT(lib.count > 0);
@@ -69,7 +69,7 @@ public:
 
         const CarlaMutex::ScopedLocker sl(fMutex);
 
-        for (List<Lib>::Itenerator it = fLibs.begin(); it.valid(); it.next())
+        for (LinkedList<Lib>::Itenerator it = fLibs.begin(); it.valid(); it.next())
         {
             Lib& lib(it.getValue());
             CARLA_ASSERT(lib.count > 0);
@@ -106,8 +106,8 @@ private:
         int count;
     };
 
-    List<Lib>  fLibs;
     CarlaMutex fMutex;
+    LinkedList<Lib> fLibs;
 };
 
 // -----------------------------------------------------------------------
diff --git a/source/utils/CarlaStateUtils.hpp b/source/utils/CarlaStateUtils.hpp
index 74742b39d..205ed63a4 100644
--- a/source/utils/CarlaStateUtils.hpp
+++ b/source/utils/CarlaStateUtils.hpp
@@ -20,7 +20,7 @@
 
 #include "CarlaBackendUtils.hpp"
 #include "CarlaMIDI.h"
-#include "List.hpp"
+#include "LinkedList.hpp"
 
 #include <QtXml/QDomNode>
 
@@ -93,11 +93,11 @@ struct StateCustomData {
     CARLA_DECLARE_NON_COPY_STRUCT(StateCustomData)
 };
 
-typedef List<StateParameter*> StateParameterList;
-typedef List<StateCustomData*> StateCustomDataList;
+typedef LinkedList<StateParameter*> StateParameterList;
+typedef LinkedList<StateCustomData*> StateCustomDataList;
 
-typedef List<StateParameter*>::Itenerator StateParameterItenerator;
-typedef List<StateCustomData*>::Itenerator StateCustomDataItenerator;
+typedef LinkedList<StateParameter*>::Itenerator StateParameterItenerator;
+typedef LinkedList<StateCustomData*>::Itenerator StateCustomDataItenerator;
 
 struct SaveState {
     const char* type;