diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9721ed427..7681e8143 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Retro-Go 1.31.1 (2022-03-08)
+- All: Fixed sound on MRGC-G32
+
+
 # Retro-Go 1.31 (2022-02-15)
 - Launcher: Fixed occasional crash when changing tab
 - GBC: Fixed high cpu usage / slowdowns
diff --git a/handy-go/components/handy/c65c02.h b/handy-go/components/handy/c65c02.h
index 2fe3fd65a..755ae0572 100644
--- a/handy-go/components/handy/c65c02.h
+++ b/handy-go/components/handy/c65c02.h
@@ -243,8 +243,6 @@ class C65C02
          //				mPC=CPU_PEEKW(NMI_VECTOR);
          //			}
 
-         //    fprintf(stderr, "cpu update\n");
-
          if(gSystemIRQ && !mI)
          {
             TRACE_CPU1("Update() IRQ taken at PC=%04x",mPC);
@@ -1756,9 +1754,7 @@ class C65C02
 
       inline void xILLEGAL(void)
       {
-         //char addr[1024];
-         //sprintf(addr,"C65C02::Update() - Illegal opcode (%02x) at PC=$%04x.",mOpcode,mPC);
-         fprintf(stderr, "C65C02::Update() - Illegal opcode (%02x) at PC=$%04x.",mOpcode,mPC);
+         log_printf("CPU: Illegal opcode $%02x at PC=$%04x.\n", mOpcode, mPC);
       }
 
    private:
diff --git a/handy-go/components/handy/cart.cpp b/handy-go/components/handy/cart.cpp
index 51f26f16f..277a80931 100644
--- a/handy-go/components/handy/cart.cpp
+++ b/handy-go/components/handy/cart.cpp
@@ -44,7 +44,6 @@
 
 //#define   TRACE_CART
 
-#include <rg_system.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
@@ -79,14 +78,14 @@ CCart::CCart(UBYTE *gamedata,ULONG gamesize)
       if(mFileHeader.magic[0]!='L' || mFileHeader.magic[1]!='Y' || mFileHeader.magic[2]!='N'
          || mFileHeader.magic[3]!='X' || mFileHeader.version!=1) {
 
-        fprintf(stderr, "Invalid cart (no header?).\nGuessing a ROM layout...\n");
+        log_printf("Invalid cart (magic number).\n");
         strncpy((char*)&mFileHeader.cartname,"NO HEADER",32);
         strncpy((char*)&mFileHeader.manufname,"HANDY",16);
         mFileHeader.page_size_bank0=gamesize>>8;// Hard workaround...
       } else {
          headersize=sizeof(LYNX_HEADER);
          mCRC32=crc32_le(0, gamedata+headersize, gamesize-headersize);
-         printf("Cart '%s' loaded, CRC32=%08X\n", mFileHeader.cartname, mCRC32);
+         log_printf("Cart '%s' loaded, CRC32=%08X\n", mFileHeader.cartname, mCRC32);
       }
 
       // As this is a cartridge boot unset the boot address
@@ -123,7 +122,7 @@ CCart::CCart(UBYTE *gamedata,ULONG gamesize)
          mCountMask0=0x7ff;
          break;
       default:
-         fprintf(stderr, "Invalid cart (bank0 size).\n");
+         log_printf("Invalid cart (bank0 size = %06x).\n", mFileHeader.page_size_bank0);
          break;
    }
    TRACE_CART1("CCart() - Bank0 = $%06x",mMaskBank0);
@@ -158,7 +157,7 @@ CCart::CCart(UBYTE *gamedata,ULONG gamesize)
          mCountMask1=0x7ff;
          break;
       default:
-         fprintf(stderr, "Invalid cart (bank1 size).\n");
+         log_printf("Invalid cart (bank1 size = %06x).\n", mFileHeader.page_size_bank1);
          break;
    }
    TRACE_CART1("CCart() - Bank1 = $%06x",mMaskBank1);
diff --git a/handy-go/components/handy/eeprom.cpp b/handy-go/components/handy/eeprom.cpp
index 52b2b9070..4ff42f8ad 100644
--- a/handy-go/components/handy/eeprom.cpp
+++ b/handy-go/components/handy/eeprom.cpp
@@ -44,7 +44,7 @@ void CEEPROM::Load(void)
    if(!Available()) return;
    FILE *fe;
    if((fe=fopen(filename,"rb"))!=NULL){
-      printf("EEPROM LOAD %s\n",filename);
+      log_printf("EEPROM: Loading from '%s'\n",filename);
       fread(romdata,1,1024,fe);
       fclose(fe);
    }
@@ -55,7 +55,7 @@ void CEEPROM::Save(void)
    if(!Available()) return;
    FILE *fe;
    if((fe=fopen(filename,"wb+"))!=NULL){
-      printf("EEPROM SAVE %s\n",filename);
+      log_printf("EEPROM: Saving to '%s'\n",filename);
       fwrite(romdata,1,Size(),fe);
       fclose(fe);
    }
@@ -111,55 +111,54 @@ bool CEEPROM::ContextLoad(LSS_FILE *fp)
 void CEEPROM::SetEEPROMType(UBYTE b)
 {
    type=b;
-   printf("\nEEPROM: ");
+   const char *type = "none";
    switch(b&0x7) {
       case 1: // 93C46 , 8 bit mode
          ADDR_MASK =  0x7F;
          CMD_BITS  =  10;
          ADDR_BITS =  7;
-         printf("93C46 ");
+         type = "93C46";
          break;
       case 2: // 93C56 , 8 bit mode
          ADDR_MASK =  0xFF;
          CMD_BITS  =  12;
          ADDR_BITS =  9;
-         printf("93C56 ");
+         type = "93C56";
          break;
       case 3: // 93C66 , 8 bit mode
          ADDR_MASK =  0x1FF;
          CMD_BITS  =  12;
          ADDR_BITS =  9;
-         printf("93C66 ");
+         type = "93C66";
          break;
       case 4: // 93C76 , 8 bit mode
          ADDR_MASK =  0x3FF;
          CMD_BITS  =  14;
          ADDR_BITS =  11;
-         printf("93C76 ");
+         type = "93C76";
          break;
       case 5: // 93C86 , 8 bit mode
          ADDR_MASK =  0x7FF;
          CMD_BITS  =  14;
          ADDR_BITS =  11;
-         printf("93C86 ");
+         type = "93C86";
          break;
       case 0: // NONE, fallthrou
       default:
          ADDR_MASK =  0;
          CMD_BITS  =  1;
          ADDR_BITS =  1;
-         printf("none ");
          break;
    }
    if(b&0x80) { // 8 bit access
       DONE_MASK =  0x100;
-      printf("8 bit\n");
+      log_printf("EEPROM: Type: %s 8bit\n", type);
    } else { // 16 bit access
       ADDR_MASK>>=1;
       CMD_BITS--;
       ADDR_BITS--;
       DONE_MASK = 0x10000;
-      printf("16 bit\n");
+      log_printf("EEPROM: Type: %s 16bit\n", type);
    }
 }
 
diff --git a/handy-go/components/handy/mikie.cpp b/handy-go/components/handy/mikie.cpp
index 1ef75a398..4137f75eb 100644
--- a/handy-go/components/handy/mikie.cpp
+++ b/handy-go/components/handy/mikie.cpp
@@ -96,15 +96,6 @@ static inline ULONG GetLfsrNext(ULONG current)
 #endif
 }
 
-void CMikie::BlowOut(void)
-{
-   C6502_REGS regs;
-   mSystem.mCpu->GetRegs(regs);
-   printf("Runtime Error - System Halted\nCMikie::Poke() - Read/Write to counter clocks at PC=$%04x.\n",regs.PC);
-   gSystemHalt=TRUE;
-   abort();
-}
-
 
 CMikie::CMikie(CSystem& parent, ULONG displayformat, ULONG samplerate)
 :mSystem(parent)
@@ -1573,7 +1564,7 @@ void CMikie::Poke(ULONG addr,UBYTE data)
          if(!(data&0x02)) {
             C6502_REGS regs;
             mSystem.mCpu->GetRegs(regs);
-            printf("Runtime Alert - System Halted\nCMikie::Poke(SYSCTL1) - Lynx power down occurred at PC=$%04x.\nResetting system.\n",regs.PC);
+            log_printf("CMikie::Poke(SYSCTL1) - Lynx power down occurred at PC=$%04x.\nResetting system.\n", regs.PC);
             mSystem.Reset();
             gSystemHalt=TRUE;
          }
@@ -1701,7 +1692,7 @@ void CMikie::Poke(ULONG addr,UBYTE data)
             case 0xFE19+3: mSystem.HLE_BIOS_FE19(); break;
             case 0xFE4A+3: mSystem.HLE_BIOS_FE4A(); break;
             case 0xFF80+3: mSystem.HLE_BIOS_FF80(); break;
-            default: printf("ROM code missing...\n");
+            default: log_printf("BIOS: Missing function $%04X\n", mSystem.mCpu->GetPC());
          }
          break;
       case (GREEN0&0xff):
@@ -3023,7 +3014,6 @@ inline void CMikie::Update(void)
       UpdateSound();
    }
 
-   //			printf("CMikie::Update() - gSystemCycleCount==gNextTimerEvent, system lock likely\n");
    //			TRACE_MIKIE1("Update() - NextTimerEvent = %012d",gNextTimerEvent);
 
    // Update system IRQ status as a result of timer activity
diff --git a/handy-go/components/handy/ram.h b/handy-go/components/handy/ram.h
index b104f1457..9daf239cf 100644
--- a/handy-go/components/handy/ram.h
+++ b/handy-go/components/handy/ram.h
@@ -83,7 +83,7 @@ class CRam : public CLynxBase
             memcpy(&mFileHeader, filememory, sizeof(HOME_HEADER));
             if(mFileHeader.magic[0]!='B' || mFileHeader.magic[1]!='S' ||
                mFileHeader.magic[2]!='9' || mFileHeader.magic[3]!='3') {
-               fprintf(stderr, "Invalid cart.\n");
+               log_printf("Invalid cart (header).\n");
             } else {
             #ifndef MSB_FIRST
                mFileHeader.load_address = mFileHeader.load_address<<8 | mFileHeader.load_address>>8;
diff --git a/handy-go/components/handy/susie.cpp b/handy-go/components/handy/susie.cpp
index 1da9babe1..a7f99357b 100644
--- a/handy-go/components/handy/susie.cpp
+++ b/handy-go/components/handy/susie.cpp
@@ -1006,7 +1006,7 @@ ULONG CSusie::PaintSprites(void)
          // Perform Sprite debugging if required, single step on sprite draw
          if(gSingleStepModeSprites) {
             // char message[256];
-            //sprintf("CSusie:PaintSprites() - Rendered Sprite %03d\n",sprcount);
+            //log_printf("CSusie:PaintSprites() - Rendered Sprite %03d\n",sprcount);
             //SingleStepModeSprites=0;
          }
       } else {
@@ -1030,7 +1030,7 @@ ULONG CSusie::PaintSprites(void)
          // Stop the system, otherwise we may just come straight back in.....
          gSystemHalt=TRUE;
          // Display warning message
-         printf("CSusie:PaintSprites(): Single draw sprite limit exceeded (>4096). The SCB is most likely looped back on itself. Reset/Exit is recommended\n");
+         log_printf("CSusie:PaintSprites(): Single draw sprite limit exceeded (>4096). The SCB is most likely looped back on itself. Reset/Exit is recommended\n");
          // Signal error to the caller
          return 0;
       }
diff --git a/handy-go/components/handy/susie.h b/handy-go/components/handy/susie.h
index 4f5bf9620..ca60fc10c 100644
--- a/handy-go/components/handy/susie.h
+++ b/handy-go/components/handy/susie.h
@@ -419,7 +419,7 @@ class CSusie : public CLynxBase
 
          if(voff>101)
          {
-            printf("CSusie::LineInit() Out of bounds (voff)\n");
+            log_printf("CSusie::LineInit() Out of bounds (voff)\n");
             voff=0;
          }
 
diff --git a/handy-go/components/handy/system.cpp b/handy-go/components/handy/system.cpp
index dfef8f7ae..a2f84a4f4 100644
--- a/handy-go/components/handy/system.cpp
+++ b/handy-go/components/handy/system.cpp
@@ -146,12 +146,12 @@ CSystem::CSystem(const char* gamefile, long displayformat, long samplerate)
       filememory=(UBYTE*) new UBYTE[filesize];
 
       if(fread(filememory, 1, filesize,fp)!=filesize) {
-         fprintf(stderr, "Invalid Cart (filesize).\n");
+         log_printf("Invalid cart (filesize).\n");
       }
 
       fclose(fp);
    } else {
-      fprintf(stderr, "Invalid Cart.\n");
+      log_printf("Invalid cart (fopen failed).\n");
    }
 
    // Now try and determine the filetype we have opened
@@ -164,10 +164,10 @@ CSystem::CSystem(const char* gamefile, long displayformat, long samplerate)
       if(!strcmp(&clip[6],"BS93")) mFileType=HANDY_FILETYPE_HOMEBREW;
       else if(!strcmp(&clip[0],"LYNX")) mFileType=HANDY_FILETYPE_LNX;
       else if(filesize==128*1024 || filesize==256*1024 || filesize==512*1024) {
-         fprintf(stderr, "Invalid Cart (type). but 128/256/512k size -> set to RAW and try to load raw rom image\n");
+         log_printf("Invalid cart (type). but 128/256/512k size -> set to RAW and try to load raw rom image\n");
          mFileType=HANDY_FILETYPE_RAW;
       } else {
-         fprintf(stderr, "Invalid Cart (type). -> set to RAW and try to load raw rom image\n");
+         log_printf("Invalid cart (type). -> set to RAW and try to load raw rom image\n");
          mFileType=HANDY_FILETYPE_RAW;
       }
    }
@@ -420,10 +420,10 @@ bool CSystem::ContextLoad(LSS_FILE *fp)
       ULONG checksum;
       // Read CRC32 and check against the CART for a match
       lss_read(&checksum,sizeof(ULONG),1,fp);
-      // if(mCart->CRC32()!=checksum) {
-      //    fprintf(stderr, "[handy]LSS Snapshot CRC does not match the loaded cartridge image, aborting load.\n");
-      //    return 0;
-      // }
+      if(mCart->CRC32()!=checksum) {
+         log_printf("CSystem::ContextLoad() LSS Snapshot CRC does not match the loaded cartridge image...\n");
+         // return 0;
+      }
 
       // Check our block header
       if(!lss_read(teststr,sizeof(char),20,fp)) status=0;
@@ -462,7 +462,7 @@ bool CSystem::ContextLoad(LSS_FILE *fp)
 
       gAudioBufferPointer = 0;
    } else {
-      fprintf(stderr, "[handy]Not a recognised LSS file\n");
+      log_printf("CSystem::ContextLoad() Not a recognised LSS file!\n");
    }
 
    return status;
@@ -475,7 +475,7 @@ void CSystem::DebugTrace(int address)
    char message[1024+1];
    int count=0;
 
-   sprintf(message,"%08x - DebugTrace(): ",gSystemCycleCount);
+   log_printf(message,"%08x - DebugTrace(): ",gSystemCycleCount);
    count=strlen(message);
 
    if(address) {
@@ -484,7 +484,7 @@ void CSystem::DebugTrace(int address)
          char linetext[1024];
          // Register dump
          mCpu->GetRegs(regs);
-         sprintf(linetext,"PC=$%04x SP=$%02x PS=0x%02x A=0x%02x X=0x%02x Y=0x%02x",regs.PC,regs.SP, regs.PS,regs.A,regs.X,regs.Y);
+         log_printf(linetext,"PC=$%04x SP=$%02x PS=0x%02x A=0x%02x X=0x%02x Y=0x%02x",regs.PC,regs.SP, regs.PS,regs.A,regs.X,regs.Y);
          strcat(message,linetext);
          count=strlen(message);
       } else {
diff --git a/handy-go/components/handy/system.h b/handy-go/components/handy/system.h
index ec42ccea3..e09eb5e6b 100644
--- a/handy-go/components/handy/system.h
+++ b/handy-go/components/handy/system.h
@@ -66,8 +66,6 @@ typedef uint32_t ULONG;
 #define FALSE	false
 #endif
 
-#include "lynxbase.h"
-
 #define HANDY_SYSTEM_FREQ                       16000000
 #define HANDY_TIMER_FREQ                        20
 #define HANDY_AUDIO_SAMPLE_FREQ                 24000 // 48000
@@ -139,6 +137,14 @@ extern UBYTE    *gPrimaryFrameBuffer;
 #define lss_write(s, vs, vc, fp) (fwrite(s, vs, vc, fp) > 0)
 #define lss_printf(fp, str) (fputs(str, fp) >= 0)
 
+//
+// Define logging functions
+//
+
+#include <rg_system.h>
+// #define log_printf(x...) printf(x)
+#define log_printf(x...) rg_system_log(RG_LOG_USER, NULL, x)
+
 
 //
 // Define the interfaces before we start pulling in the classes
@@ -185,7 +191,6 @@ class CSystem : public CSystemBase
 
       inline void Update(void)
       {
-         //         fprintf(stderr, "sys update\n");
          //
          // Only update if there is a predicted timer event
          //
@@ -197,7 +202,6 @@ class CSystem : public CSystemBase
          // Step the processor through 1 instruction
          //
          mCpu->Update();
-         //         fprintf(stderr, "end cpu update\n");
 
 #ifdef _LYNXDBG
          // Check breakpoint
@@ -216,8 +220,6 @@ class CSystem : public CSystemBase
          {
             gSystemCycleCount=gNextTimerEvent;
          }
-
-         //         fprintf(stderr, "end sys update\n");
       }
 
       inline void UpdateFrame(bool draw)