diff --git a/projects/Makefile b/projects/Makefile
index 9fc7e43d1..00fd0a4ae 100644
--- a/projects/Makefile
+++ b/projects/Makefile
@@ -106,8 +106,8 @@ SDL2AUDIODIRS := \
 
 BEAGLEBOARDDIRS := $(LINUXDIRS) $(DUMMYMIDIDIRS) $(RTAUDIODIRS) $(SDLDIRS)
 DEBDIRS := $(DBDIRS) $(JACKDIRS) $(RTAUDIODIRS) $(RTMIDIDIRS) $(SDLDIRS)
-RASPIDIRS := $(DBDIRS) $(RTAUDIODIRS) $(RTMIDIDIRS) $(SDLDIRS)
-RG35XXPLUSDIRS := $(LINUXDIRS) $(DUMMYMIDIDIRS) $(SDL2DIRS) $(SDL2AUDIODIRS)
+DIRS := $(DBDIRS) $(RTAUDIODIRS) $(RTMIDIDIRS) $(SDLDIRS)
+RG35XXPLUSDIRS := $(LINUXDIRS) $(RTMIDIDIRS) $(SDL2DIRS) $(SDL2AUDIODIRS)
 STEAMDIRS := $(LINUXDIRS) $(JACKDIRS) $(RTAUDIODIRS) $(RTMIDIDIRS) $(SDLDIRS)
 X64DIRS := $(LINUXDIRS) $(RTMIDIDIRS) $(SDL2DIRS) $(SDL2AUDIODIRS)
 X86DIRS := $(LINUXDIRS) $(RTMIDIDIRS) $(SDL2DIRS) $(SDL2AUDIODIRS)
@@ -326,7 +326,7 @@ SDLAUDIOFILES := \
 DEBFILES := $(DBFILES) $(RTAUDIOFILES) $(RTMIDIFILES) $(JACKFILES)
 BEAGLEBOARDFILES := $(LINUXFILES) $(DUMMYMIDIFILES)
 RASPIFILES := $(DBFILES) $(RTAUDIOFILES) $(RTMIDIFILES)
-RG35XXPLUSFILES := $(LINUXFILES) $(SDLAUDIOFILES) $(DUMMYMIDIFILES)
+RG35XXPLUSFILES := $(LINUXFILES) $(SDLAUDIOFILES) $(RTMIDIFILES)
 STEAMFILES := $(LINUXFILES) $(RTAUDIOFILES) $(RTMIDIFILES) $(JACKFILES)
 X64FILES := $(LINUXFILES) $(RTMIDIFILES) $(SDLAUDIOFILES)
 X86FILES := $(LINUXFILES) $(RTMIDIFILES) $(SDLAUDIOFILES)
diff --git a/projects/Makefile.RG35XXPLUS b/projects/Makefile.RG35XXPLUS
index dc04b211f..3b703340d 100644
--- a/projects/Makefile.RG35XXPLUS
+++ b/projects/Makefile.RG35XXPLUS
@@ -9,10 +9,13 @@ DEFINES := \
 	-DHAVE_STDINT_H \
 	-D_NDEBUG \
 	-D_NO_JACK_ \
+	-D__LINUX_ALSA__ \
+	-D__LINUX_ALSASEQ__ \
 	-DSDL2 \
-	-DSDLAUDIO \
-	-DDUMMYMIDI \
-	-DFFMPEG_ENABLED
+    -DSDLAUDIO \
+	-DRTMIDI \
+	-DFFMPEG_ENABLED \
+    -D_FEAT_MIDI_MULTITHREAD
 
 DEVKIT := /opt/rg35xx-plus-aarch64-SDL2-SDK-0.1.0/
 CROSS_COMPILE:=$(DEVKIT)bin/aarch64-none-linux-gnu-
@@ -27,8 +30,8 @@ SDL_LIBS    := -lSDL2
 OPT_FLAGS = -O3 -mlittle-endian -mabi=lp64 -march=armv8-a+crypto+crc -fasynchronous-unwind-tables -fstack-protector-strong -Wformat -Wformat-security -fstack-clash-protection -dumpbase
 INCLUDES = -Iinclude $(SDL_CFLAGS) -I$(DEVKIT)/$(TRIPLET)/include -I$(DEVKIT)/$(TRIPLET)/include/c++/11/ -I$(PWD)/../sources
 CFLAGS	:=	$(DEFINES) $(INCLUDES) $(OPT_FLAGS) -Wall  
-CXXFLAGS:=	$(CFLAGS) -std=gnu++03 
-LIBS	:= -Wl,-rpath-link,$(DEVKIT)/$(TRIPLET)/lib -Wl,-rpath-link,$(DEVKIT)/$(TRIPLET)/lib/pulseaudio $(SDL_LIBS) -lpthread
+CXXFLAGS:=	$(CFLAGS) -std=gnu++11
+LIBS	:= -Wl,-rpath-link,$(DEVKIT)/$(TRIPLET)/lib -Wl,-rpath-link,$(DEVKIT)/$(TRIPLET)/lib/pulseaudio $(SDL_LIBS) -lpthread -lasound
 OUTPUT = ../lgpt-rg35xxplus
 EXTENSION:= elf
 
diff --git a/sources/Adapters/SDL2/GUI/SDLGUIWindowImp.cpp b/sources/Adapters/SDL2/GUI/SDLGUIWindowImp.cpp
index 7f4eb05ab..a849e5975 100644
--- a/sources/Adapters/SDL2/GUI/SDLGUIWindowImp.cpp
+++ b/sources/Adapters/SDL2/GUI/SDLGUIWindowImp.cpp
@@ -138,6 +138,7 @@ SDLGUIWindowImp::SDLGUIWindowImp(GUICreateWindowParams &p)
 	instance_=this ;
 	currentColor_=0;
 	backgroundColor_=0 ;
+	foregroundColor_=0 ;
 	SDL_ShowCursor(SDL_DISABLE);
 	FontConfig();
 
@@ -176,11 +177,17 @@ void SDLGUIWindowImp::prepareFullFonts()
 	for (int i=0;i<FONT_COUNT;i++)
   {
     
-	  fonts[i] = SDL_CreateRGBSurface(
+    if (fonts[i] == NULL)
+    {
+	    fonts[i] = SDL_CreateRGBSurface(
                  SDL_SWSURFACE,
                  8*mult_, 8*mult_, 
-                 bitDepth_,
-                 0, 0, 0, 0);
+                 surface_->format->BitsPerPixel,
+                 surface_->format->Rmask,
+                 surface_->format->Gmask,
+                 surface_->format->Bmask,
+                 surface_->format->Amask);
+    }
 		if (fonts[i]==NULL) 
     {
 			Trace::Error("[DISPLAY] Failed to create font surface %d",i) ;
@@ -275,7 +282,12 @@ void SDLGUIWindowImp::DrawChar(const char c, GUIPoint &pos, GUITextProperties &p
 		area->w=8*mult_ ;
 	}
 
-	if (((cacheFonts_)&&(currentColor_==foregroundColor_)&&(!p.invert_))) {
+	bool useCache = false;
+	if (cacheFonts_ && (currentColor_ == foregroundColor_) && (!p.invert_)) {
+		useCache = true;
+	}
+
+	if (useCache) {
 
 		SDL_Rect srcRect ;
 		srcRect.x=0 ;
@@ -296,7 +308,7 @@ void SDLGUIWindowImp::DrawChar(const char c, GUIPoint &pos, GUITextProperties &p
 
 	} else {
 		// prepare bg & fg pixel ptr
-        int pixelSize=surface_->format->BytesPerPixel ;
+		int pixelSize=surface_->format->BytesPerPixel ;
 		unsigned char *bgPtr=(unsigned char *)&backgroundColor_ ;
 		unsigned char *fgPtr=(unsigned char *)&currentColor_ ;
 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
@@ -304,7 +316,7 @@ void SDLGUIWindowImp::DrawChar(const char c, GUIPoint &pos, GUITextProperties &p
 		fgPtr+=(4-pixelSize) ;
 #endif
 		const unsigned char *src=font+c*8 ;
-        unsigned char *dest=((unsigned char *)surface_->pixels) + (yy*surface_->pitch) + xx*pixelSize;
+		unsigned char *dest=((unsigned char *)surface_->pixels) + (yy*surface_->pitch) + xx*pixelSize;
 
 		for (int y = 0; y < 8; y++) {
 			for (int n=0;n<mult_;n++) {
@@ -355,7 +367,12 @@ void SDLGUIWindowImp::DrawString(const char *string,GUIPoint &pos,GUITextPropert
 
 	for (int l=0;l<len;l++)
   {
-		if (((cacheFonts_)&&(currentColor_==foregroundColor_)&&(!p.invert_)))
+		bool useCache = false;
+		if (cacheFonts_ && (currentColor_ == foregroundColor_) && (!p.invert_)) {
+			useCache = true;
+		}
+
+		if (useCache)
     {
 			SDL_Rect srcRect ;
 			srcRect.x=0 ;
@@ -378,7 +395,7 @@ void SDLGUIWindowImp::DrawString(const char *string,GUIPoint &pos,GUITextPropert
     else
     {
 			// prepare bg & fg pixel ptr
-            int pixelSize=surface_->format->BytesPerPixel ;
+			int pixelSize=surface_->format->BytesPerPixel ;
 			unsigned char *bgPtr=(unsigned char *)&backgroundColor_ ;
 			unsigned char *fgPtr=(unsigned char *)&currentColor_ ;
 #if SDL_BYTEORDER == SDL_BIG_ENDIAN
@@ -386,7 +403,7 @@ void SDLGUIWindowImp::DrawString(const char *string,GUIPoint &pos,GUITextPropert
 			fgPtr+=(4-pixelSize) ;
 #endif
 			const unsigned char *src=font+(string[l]*8) ;
-            unsigned char *dest=((unsigned char *)surface_->pixels) + (yy*surface_->pitch) + xx*pixelSize;
+			unsigned char *dest=((unsigned char *)surface_->pixels) + (yy*surface_->pitch) + xx*pixelSize;
 
 			for (int y = 0; y < 8; y++) {
 				for (int n=0;n<mult_;n++) {
@@ -422,7 +439,13 @@ void SDLGUIWindowImp::Clear(GUIColor &c,bool overlay)
   rect.w = screenRect_.Width();
   rect.h = screenRect_.Height();
  
-    backgroundColor_=SDL_MapRGB(surface_->format,c._r&0xFF,c._g&0xFF,c._b&0xFF);
+  Uint32 newBg = SDL_MapRGB(surface_->format,c._r&0xFF,c._g&0xFF,c._b&0xFF);
+  if (newBg != backgroundColor_) {
+      backgroundColor_ = newBg;
+      if (cacheFonts_) {
+          prepareFullFonts();
+      }
+  }
   SDL_FillRect(surface_, &rect,backgroundColor_) ;
 
 	if (!framebuffer_)