diff --git a/c++/carla-backend/vst.cpp b/c++/carla-backend/vst.cpp
index 2b982c1..230f370 100644
--- a/c++/carla-backend/vst.cpp
+++ b/c++/carla-backend/vst.cpp
@@ -1692,7 +1692,7 @@ public:
     static intptr_t VSTCALLBACK hostCallback(AEffect* const effect, const int32_t opcode, const int32_t index, const intptr_t value, void* const ptr, const float opt)
     {
 #ifdef DEBUG
-        if (opcode != audioMasterGetTime)
+        if (opcode != audioMasterGetTime && opcode != audioMasterProcessEvents && opcode != audioMasterGetCurrentProcessLevel && opcode != audioMasterGetOutputLatency)
             qDebug("VstPlugin::hostCallback(%p, %02i:%s, %i, " P_INTPTR ", %p, %f)", effect, opcode, vstMasterOpcode2str(opcode), index, value, ptr, opt);
 #endif
 
@@ -2153,6 +2153,15 @@ public:
             return false;
         }
 
+#ifdef VESTIGE_HEADER
+        effect->ptr1 = this;
+#else
+        effect->resvd1 = ToVstPtr(this);
+#endif
+
+        effect->dispatcher(effect, effOpen, 0, 0, nullptr, 0.0f);
+        effect->dispatcher(effect, effMainsChanged, 0, 1, nullptr, 0.0f);
+
         // ---------------------------------------------------------------
         // get info
 
@@ -2174,16 +2183,18 @@ public:
         }
 
         // ---------------------------------------------------------------
-        // initialize VST stuff
+        // register client
 
-#ifdef VESTIGE_HEADER
-        effect->ptr1 = this;
-#else
-        effect->resvd1 = ToVstPtr(this);
-#endif
+        x_client = x_engine->addClient(this);
 
-        effect->dispatcher(effect, effOpen, 0, 0, nullptr, 0.0f);
-        effect->dispatcher(effect, effMainsChanged, 0, 1, nullptr, 0.0f);
+        if (! x_client->isOk())
+        {
+            setLastError("Failed to register plugin client");
+            return false;
+        }
+
+        // ---------------------------------------------------------------
+        // initialize VST stuff
 
 #if ! VST_FORCE_DEPRECATED
         effect->dispatcher(effect, effSetBlockSizeAndSampleRate, 0, x_engine->getBufferSize(), nullptr, x_engine->getSampleRate());
@@ -2211,17 +2222,6 @@ public:
         if ((effect->flags & effFlagsCanReplacing) > 0 && effect->processReplacing != effect->process)
             m_hints |= PLUGIN_CAN_PROCESS_REPLACING;
 
-        // ---------------------------------------------------------------
-        // register client
-
-        x_client = x_engine->addClient(this);
-
-        if (! x_client->isOk())
-        {
-            setLastError("Failed to register plugin client");
-            return false;
-        }
-
         // ---------------------------------------------------------------
         // gui stuff
 
diff --git a/c++/carla-bridge/carla_bridge_plugin.cpp b/c++/carla-bridge/carla_bridge_plugin.cpp
index be856f0..46b6d7b 100644
--- a/c++/carla-bridge/carla_bridge_plugin.cpp
+++ b/c++/carla-bridge/carla_bridge_plugin.cpp
@@ -220,6 +220,8 @@ public:
     {
         qDebug("BridgePluginClient::BridgePluginClient()");
 
+        hasUI = false;
+
         msgTimer   = 0;
         nextWidth  = 0;
         nextHeight = 0;
@@ -265,7 +267,8 @@ public:
 
         if (showGui)
         {
-            show();
+            if (hasUI)
+                show();
         }
         else
         {
@@ -348,6 +351,8 @@ public:
         if (! (plugin && pluginGui))
             return;
 
+        hasUI = true;
+
         pluginGui->setResizable(resizable);
         pluginGui->setTitle(plugin->name());
 
@@ -662,6 +667,7 @@ protected:
     // ---------------------------------------------------------------------
 
 private:
+    bool hasUI;
     int msgTimer;
     int nextWidth, nextHeight;
     QString nextChunkFilePath;
diff --git a/c++/carla-jackbridge/carla_jackbridge.h b/c++/carla-jackbridge/carla_jackbridge.h
index dec0811..29f7a2f 100644
--- a/c++/carla-jackbridge/carla_jackbridge.h
+++ b/c++/carla-jackbridge/carla_jackbridge.h
@@ -23,6 +23,8 @@
 #include <jack/types.h>
 #include <jack/transport.h> // needed for JACK1
 
+#ifdef BUILD_BRIDGE
+
 typedef unsigned char jackbridge_midi_data_t;
 
 struct jackbridge_midi_event_t {
@@ -38,7 +40,6 @@ CARLA_EXPORT char* jackbridge_get_client_name(jack_client_t* client);
 CARLA_EXPORT int jackbridge_port_name_size();
 CARLA_EXPORT int jackbridge_activate(jack_client_t* client);
 CARLA_EXPORT int jackbridge_deactivate(jack_client_t* client);
-CARLA_EXPORT int jackbridge_set_process_thread(jack_client_t* client, JackThreadCallback thread_callback, void *arg);
 CARLA_EXPORT void jackbridge_on_shutdown(jack_client_t* client, JackShutdownCallback shutdown_callback, void* arg);
 CARLA_EXPORT int jackbridge_set_process_callback(jack_client_t* client, JackProcessCallback process_callback, void* arg);
 CARLA_EXPORT int jackbridge_set_freewheel_callback(jack_client_t* client, JackFreewheelCallback freewheel_callback, void* arg);
@@ -58,4 +59,37 @@ CARLA_EXPORT int jackbridge_midi_event_write(void* port_buffer, jack_nframes_t t
 
 CARLA_EXPORT jack_transport_state_t jackbridge_transport_query(const jack_client_t* client, jack_position_t* pos);
 
+#else
+
+#define jackbridge_midi_data_t jack_midi_data_t
+#define jackbridge_midi_event_t jack_midi_event_t
+
+#define jackbridge_client_open jack_client_open
+#define jackbridge_client_close jack_client_close
+#define jackbridge_client_name_size jack_client_name_size
+#define jackbridge_get_client_name jack_get_client_name
+#define jackbridge_port_name_size jack_port_name_size
+#define jackbridge_activate jack_activate
+#define jackbridge_deactivate jack_deactivate
+#define jackbridge_on_shutdown jack_on_shutdown
+#define jackbridge_set_process_callback jack_set_process_callback
+#define jackbridge_set_freewheel_callback jack_set_freewheel_callback
+#define jackbridge_set_buffer_size_callback jack_set_buffer_size_callback
+#define jackbridge_set_sample_rate_callback jack_set_sample_rate_callback
+#define jackbridge_get_sample_rate jack_get_sample_rate
+#define jackbridge_get_buffer_size jack_get_buffer_size
+#define jackbridge_port_register jack_port_register
+#define jackbridge_port_unregister jack_port_unregister
+#define jackbridge_port_get_buffer jack_port_get_buffer
+
+#define jackbridge_midi_get_event_count jack_midi_get_event_count
+#define jackbridge_midi_event_get jack_midi_event_get
+#define jackbridge_midi_clear_buffer jack_midi_clear_buffer
+#define jackbridge_midi_event_reserve jack_midi_event_reserve
+#define jackbridge_midi_event_write jack_midi_event_write
+
+#define jackbridge_transport_query jack_transport_query
+
+#endif
+
 #endif // CARLA_JACKBRIDGE_H