diff --git a/source/Makefile.deps.mk b/source/Makefile.deps.mk
index d576229a1..655b9a046 100644
--- a/source/Makefile.deps.mk
+++ b/source/Makefile.deps.mk
@@ -394,7 +394,11 @@ QT5_FLAGS = $(shell $(PKG_CONFIG) --cflags Qt5Core Qt5Gui Qt5Widgets)
 QT5_LIBS  = $(shell $(PKG_CONFIG) --libs Qt5Core Qt5Gui Qt5Widgets)
 endif
 
-ifeq ($(HAVE_SDL2),true)
+ifeq ($(WASM),true)
+HAVE_SDL  = true
+SDL_FLAGS = -sUSE_SDL=2
+SDL_LIBS  = -sUSE_SDL=2
+else ifeq ($(HAVE_SDL2),true)
 HAVE_SDL  = true
 SDL_FLAGS = $(shell $(PKG_CONFIG) $(PKG_CONFIG_FLAGS) --cflags sdl2)
 SDL_LIBS  = $(shell $(PKG_CONFIG) $(PKG_CONFIG_FLAGS) --libs sdl2)
diff --git a/source/backend/engine/CarlaEngineSDL.cpp b/source/backend/engine/CarlaEngineSDL.cpp
index 0925491cf..a9bd638fd 100644
--- a/source/backend/engine/CarlaEngineSDL.cpp
+++ b/source/backend/engine/CarlaEngineSDL.cpp
@@ -21,16 +21,12 @@
 #include "CarlaStringList.hpp"
 #include "CarlaBackendUtils.hpp"
 
-#include "SDL.h"
+#include <SDL.h>
 
 #ifndef HAVE_SDL2
 typedef Uint32 SDL_AudioDeviceID;
 #endif
 
-#if defined(HAVE_SDL2) && !defined(CARLA_OS_WASM)
-# define HAVE_SDL2_CALLS
-#endif
-
 CARLA_BACKEND_START_NAMESPACE
 
 // -------------------------------------------------------------------------------------------------------------------
@@ -52,12 +48,12 @@ static void initAudioDevicesIfNeeded()
 #ifdef HAVE_SDL2
     SDL_InitSubSystem(SDL_INIT_AUDIO);
 
-# ifdef HAVE_SDL2_CALLS
     const int numDevices = SDL_GetNumAudioDevices(0);
 
     for (int i=0; i<numDevices; ++i)
         gDeviceNames.append(SDL_GetAudioDeviceName(i, 0));
-# endif
+#else
+    SDL_Init(SDL_INIT_AUDIO);
 #endif
 }
 
@@ -114,7 +110,11 @@ public:
         requested.callback = carla_sdl_process_callback;
         requested.userdata = this;
 
-#ifdef HAVE_SDL2_CALLS
+#ifdef HAVE_SDL2
+        SDL_SetHint(SDL_HINT_AUDIO_DEVICE_APP_NAME, clientName);
+        // SDL_SetHint(SDL_HINT_AUDIO_DEVICE_STREAM_NAME, );
+        SDL_SetHint(SDL_HINT_AUDIO_RESAMPLING_MODE, "2");
+
         const char* const deviceName = pData->options.audioDevice != nullptr && pData->options.audioDevice[0] != '\0'
                                      ? pData->options.audioDevice
                                      : nullptr;
@@ -136,7 +136,7 @@ public:
 
         if (received.channels == 0)
         {
-#ifdef HAVE_SDL2_CALLS
+#ifdef HAVE_SDL2
             SDL_CloseAudioDevice(fDeviceId);
 #else
             SDL_CloseAudio();
@@ -164,12 +164,14 @@ public:
 
         pData->graph.create(0, fAudioOutCount, 0, 0);
 
-#ifdef HAVE_SDL2_CALLS
+#ifdef HAVE_SDL2
         SDL_PauseAudioDevice(fDeviceId, 0);
 #else
         SDL_PauseAudio(0);
 #endif
-        carla_stdout("open fAudioOutCount %d %d %d", fAudioOutCount, received.samples, received.freq);
+        carla_stdout("open fAudioOutCount %d %d %d | %d vs %d",
+                     fAudioOutCount, received.samples, received.freq,
+                     received.format, requested.format);
 
         patchbayRefresh(true, false, false);
 
@@ -195,7 +197,7 @@ public:
         if (fDeviceId != 0)
         {
             // SDL_PauseAudioDevice(fDeviceId, 1);
-#ifdef HAVE_SDL2_CALLS
+#ifdef HAVE_SDL2
             SDL_CloseAudioDevice(fDeviceId);
 #else
             SDL_CloseAudio();
diff --git a/source/tests/Makefile b/source/tests/Makefile
index af01535e2..616bc722b 100644
--- a/source/tests/Makefile
+++ b/source/tests/Makefile
@@ -146,7 +146,7 @@ carla-engine-sdl$(APP_EXT): $(OBJDIR)/carla-engine-sdl.c.o
 		$(MODULEDIR)/water.a \
 		$(MODULEDIR)/ysfx.a \
 		$(MODULEDIR)/zita-resampler.a \
-		-lSDL --preload-file foolme.mp3 -sALLOW_MEMORY_GROWTH \
+		$(SDL_LIBS) --preload-file foolme.mp3 -sALLOW_MEMORY_GROWTH \
 		-o $@
 
 # ---------------------------------------------------------------------------------------------------------------------
diff --git a/source/tests/carla-engine-sdl.c b/source/tests/carla-engine-sdl.c
index ad69227d5..27fa6dc8c 100644
--- a/source/tests/carla-engine-sdl.c
+++ b/source/tests/carla-engine-sdl.c
@@ -26,10 +26,12 @@
 static void engine_idle_loop(void* const arg)
 {
     const CarlaHostHandle handle = arg;
+    carla_engine_idle(handle);
+
+    /*
     static int counter = 0;
     if (++counter == 100)
     {
-    carla_engine_idle(handle);
         counter = 0;
         const uint64_t frame = carla_get_current_transport_frame(handle);
         printf("engine_idle_loop | play frame %llu | audio peaks %f %f\n",
@@ -37,6 +39,7 @@ static void engine_idle_loop(void* const arg)
                carla_get_output_peak_value(handle, 0, true),
                carla_get_output_peak_value(handle, 0, false));
     }
+    */
 }
 
 int main(void)
@@ -70,18 +73,26 @@ int main(void)
     if (!engine_init)
         return 1;
 
-    const bool plugin_added = carla_add_plugin(handle, BINARY_NATIVE, PLUGIN_INTERNAL, NULL, "Music", "audiofile", 0, NULL, PLUGIN_OPTIONS_NULL);
+    const bool plugin_added = carla_add_plugin(handle, BINARY_NATIVE, PLUGIN_INTERNAL, NULL, "Music", "audiofile", 0, NULL, 0x0);
     printf("carla_add_plugin: %d\n", plugin_added);
 
     if (!plugin_added)
         goto close;
 
+    const bool plugin_added2 = carla_add_plugin(handle, BINARY_NATIVE, PLUGIN_INTERNAL, NULL, "Gain", "audiogain_s", 0, NULL, 0x0);
+    printf("carla_add_plugin2: %d\n", plugin_added2);
+
+    if (!plugin_added2)
+        goto close;
+
     const uint32_t current_plugins_count = carla_get_current_plugin_count(handle);
     printf("carla_get_current_plugin_count: %u\n", current_plugins_count);
 
-    if (current_plugins_count != 1)
+    if (current_plugins_count != 2)
         goto close;
 
+    carla_set_parameter_value(handle, 1, 0, 1.0f); // gain
+
     carla_patchbay_connect(handle, false, 1, 3, 3, 1);
     carla_patchbay_connect(handle, false, 1, 4, 3, 2);