diff --git a/bsnes/Makefile b/bsnes/Makefile
index 88a4caaf..3b20cc03 100755
--- a/bsnes/Makefile
+++ b/bsnes/Makefile
@@ -2,7 +2,7 @@ include nall/Makefile
 snes := snes
 gameboy := gameboy
 profile := compatibility
-ui := ui-gameboy
+ui := ui
 
 # compiler
 c       := $(compiler) -std=gnu99
diff --git a/bsnes/gameboy/apu/apu.cpp b/bsnes/gameboy/apu/apu.cpp
index 2b5ce1dd..87c90d95 100755
--- a/bsnes/gameboy/apu/apu.cpp
+++ b/bsnes/gameboy/apu/apu.cpp
@@ -21,23 +21,24 @@ void APU::main() {
       scheduler.exit(Scheduler::ExitReason::SynchronizeEvent);
     }
 
-    if((counter & 8191) == 0) {  //512hz
-      if(sequencer == 0 || sequencer == 2 || sequencer == 4 || sequencer == 6) {  //256hz
+    if(sequencer_base == 0) {  //512hz
+      if(sequencer_step == 0 || sequencer_step == 2 || sequencer_step == 4 || sequencer_step == 6) {  //256hz
         square1.clock_length();
         square2.clock_length();
         wave.clock_length();
         noise.clock_length();
       }
-      if(sequencer == 2 || sequencer == 6) {  //128hz
+      if(sequencer_step == 2 || sequencer_step == 6) {  //128hz
         square1.clock_sweep();
       }
-      if(sequencer == 7) {  //64hz
+      if(sequencer_step == 7) {  //64hz
         square1.clock_envelope();
         square2.clock_envelope();
         noise.clock_envelope();
       }
-      sequencer = (sequencer + 1) & 7;
+      sequencer_step++;
     }
+    sequencer_base++;
 
     square1.run();
     square2.run();
@@ -46,9 +47,6 @@ void APU::main() {
     master.run();
 
     system.interface->audio_sample(master.center, master.left, master.right);
-
-    if(++counter == 4194304) counter = 0;
-
     if(++clock >= 0) co_switch(scheduler.active_thread = cpu.thread);
   }
 }
@@ -58,8 +56,8 @@ void APU::power() {
   for(unsigned n = 0xff10; n <= 0xff3f; n++) bus.mmio[n] = this;
 
   foreach(n, mmio_data) n = 0x00;
-  counter = 0;
-  sequencer = 0;
+  sequencer_base = 0;
+  sequencer_step = 0;
 
   square1.power();
   square2.power();
diff --git a/bsnes/gameboy/apu/apu.hpp b/bsnes/gameboy/apu/apu.hpp
index 935d92fe..7218415c 100755
--- a/bsnes/gameboy/apu/apu.hpp
+++ b/bsnes/gameboy/apu/apu.hpp
@@ -6,8 +6,8 @@ struct APU : Processor, MMIO {
   #include "master/master.hpp"
 
   uint8 mmio_data[48];
-  unsigned counter;
-  unsigned sequencer;
+  uint13 sequencer_base;
+  uint3 sequencer_step;
 
   Square1 square1;
   Square2 square2;
diff --git a/bsnes/gameboy/apu/master/master.cpp b/bsnes/gameboy/apu/master/master.cpp
index 591d52d6..c2df5ccd 100755
--- a/bsnes/gameboy/apu/master/master.cpp
+++ b/bsnes/gameboy/apu/master/master.cpp
@@ -1,15 +1,26 @@
 #ifdef APU_CPP
 
 void APU::Master::run() {
-  signed sample = 0, channels = 4;
+  if(enable == false) {
+    center = 0;
+    left   = 0;
+    right  = 0;
+    return;
+  }
+
+  signed sample = 0, channels;
   sample += apu.square1.output;
   sample += apu.square2.output;
   sample +=    apu.wave.output;
   sample +=   apu.noise.output;
-  sample /= channels;
-  if(sample < -32768) sample = -32768;
-  if(sample > +32767) sample = +32767;
-  center = sample;
+  sample >>= 2;
+  center = sclamp<16>(sample);
+
+  if(left_enable == false && right_enable == false) {
+    left  = center;
+    right = center;
+    return;
+  }
 
   sample = 0;
   channels = 0;
@@ -18,17 +29,16 @@ void APU::Master::run() {
   if(channel3_left_enable) { sample +=    apu.wave.output; channels++; }
   if(channel4_left_enable) { sample +=   apu.noise.output; channels++; }
   if(channels) sample /= channels;
-  left = sample;
+  left = sclamp<16>(sample);
 
   switch(left_volume) {
-    case 0: left *= 0.125; break;
-    case 1: left *= 0.250; break;
-    case 2: left *= 0.375; break;
-    case 3: left *= 0.500; break;
-    case 4: left *= 0.625; break;
-    case 5: left *= 0.750; break;
-    case 6: left *= 0.875; break;
-    case 7: left *= 1.000; break;
+    case 0: left >>= 3;                       break;  // 12.5%
+    case 1: left >>= 2;                       break;  // 25.0%
+    case 2: left = (left >> 2) + (left >> 3); break;  // 37.5%
+    case 3: left >>= 1;                       break;  // 50.0%
+    case 4: left = (left >> 1) + (left >> 3); break;  // 62.5%
+    case 5: left -= (left >> 2);              break;  // 75.0%
+    case 6: left -= (left >> 3);              break;  // 87.5%
   }
   if(left_enable == false) left = 0;
 
@@ -39,30 +49,18 @@ void APU::Master::run() {
   if(channel3_right_enable) { sample +=    apu.wave.output; channels++; }
   if(channel4_right_enable) { sample +=   apu.noise.output; channels++; }
   if(channels) sample /= channels;
-  right = sample;
+  right = sclamp<16>(sample);
 
   switch(right_volume) {
-    case 0: right *= 0.125; break;
-    case 1: right *= 0.250; break;
-    case 2: right *= 0.375; break;
-    case 3: right *= 0.500; break;
-    case 4: right *= 0.625; break;
-    case 5: right *= 0.750; break;
-    case 6: right *= 0.875; break;
-    case 7: right *= 1.000; break;
+    case 0: right >>= 3;                         break;  // 12.5%
+    case 1: right >>= 2;                         break;  // 25.0%
+    case 2: right = (right >> 2) + (right >> 3); break;  // 37.5%
+    case 3: right >>= 1;                         break;  // 50.0%
+    case 4: right = (right >> 1) + (right >> 3); break;  // 62.5%
+    case 5: right -= (right >> 2);               break;  // 75.0%
+    case 6: right -= (right >> 3);               break;  // 87.5%
   }
   if(right_enable == false) right = 0;
-
-  if(left_enable == false && right_enable == false) {
-    left  = center;
-    right = center;
-  }
-
-  if(enable == false) {
-    center = 0;
-    left   = 0;
-    right  = 0;
-  }
 }
 
 void APU::Master::write(unsigned r, uint8 data) {
diff --git a/bsnes/gameboy/apu/serialization.cpp b/bsnes/gameboy/apu/serialization.cpp
index e781d5a4..c04dc533 100755
--- a/bsnes/gameboy/apu/serialization.cpp
+++ b/bsnes/gameboy/apu/serialization.cpp
@@ -2,8 +2,8 @@
 
 void APU::serialize(serializer &s) {
   s.array(mmio_data);
-  s.integer(counter);
-  s.integer(sequencer);
+  s.integer(sequencer_base);
+  s.integer(sequencer_step);
 
   square1.serialize(s);
   square2.serialize(s);
diff --git a/bsnes/gameboy/apu/wave/wave.cpp b/bsnes/gameboy/apu/wave/wave.cpp
index 449c99df..bce6f444 100755
--- a/bsnes/gameboy/apu/wave/wave.cpp
+++ b/bsnes/gameboy/apu/wave/wave.cpp
@@ -12,12 +12,7 @@ void APU::Wave::run() {
   if(enable == false) sample = 0;
 
   output = (sample * 4369) - 32768;
-  switch(volume) {
-    case 0: output *= 0.00; break;
-    case 1: output *= 1.00; break;
-    case 2: output *= 0.50; break;
-    case 3: output *= 0.25; break;
-  }
+  output >>= volume;
 }
 
 void APU::Wave::clock_length() {
@@ -38,7 +33,12 @@ void APU::Wave::write(unsigned r, uint8 data) {
   }
 
   if(r == 2) {
-    volume = (data >> 5) & 3;
+    switch((data >> 5) & 3) {
+      case 0: volume = 16; break;  //  0%
+      case 1: volume =  0; break;  //100%
+      case 2: volume =  1; break;  // 50%
+      case 3: volume =  2; break;  // 25%
+    }
   }
 
   if(r == 3) {
diff --git a/bsnes/gameboy/cpu/cpu.cpp b/bsnes/gameboy/cpu/cpu.cpp
index 0b30ba1f..b78aac8b 100755
--- a/bsnes/gameboy/cpu/cpu.cpp
+++ b/bsnes/gameboy/cpu/cpu.cpp
@@ -94,7 +94,7 @@ void CPU::interrupt_exec(uint16 pc) {
 }
 
 void CPU::power() {
-  create(Main, 4 * 1024 * 1024);
+  create(Main, 4194304);
 
   for(unsigned n = 0xc000; n <= 0xdfff; n++) bus.mmio[n] = this;  //WRAM
   for(unsigned n = 0xe000; n <= 0xfdff; n++) bus.mmio[n] = this;  //WRAM (mirror)
diff --git a/bsnes/gameboy/cpu/timing/timing.cpp b/bsnes/gameboy/cpu/timing/timing.cpp
index 215e8977..f771466c 100755
--- a/bsnes/gameboy/cpu/timing/timing.cpp
+++ b/bsnes/gameboy/cpu/timing/timing.cpp
@@ -1,13 +1,9 @@
 //4194304hz (4 * 1024 * 1024)
+
 //70224 clocks/frame
 //  456 clocks/scanline
 //  154 scanlines/frame
 
-//4194304 /   4096 = 1024
-//4194304 / 262144 =   16
-//4194304 /  65536 =   64
-//4394304 /  16384 =  256
-
 #ifdef CPU_CPP
 
 #include "opcode.cpp"
@@ -17,8 +13,8 @@ void CPU::add_clocks(unsigned clocks) {
   scheduler.exit(Scheduler::ExitReason::StepEvent);
 
   status.clock += clocks;
-  if(status.clock >= 4 * 1024 * 1024) {
-    status.clock -= 4 * 1024 * 1024;
+  if(status.clock >= 4194304) {
+    status.clock -= 4194304;
     cartridge.mbc3.second();
   }
 
diff --git a/bsnes/gameboy/gameboy.hpp b/bsnes/gameboy/gameboy.hpp
index 9a47a5ba..eac830c2 100755
--- a/bsnes/gameboy/gameboy.hpp
+++ b/bsnes/gameboy/gameboy.hpp
@@ -5,7 +5,7 @@
 namespace GameBoy {
   namespace Info {
     static const char Name[] = "bgameboy";
-    static const char Version[] = "000.16";
+    static const char Version[] = "000.17";
     static unsigned SerializerVersion = 1;
   }
 }
@@ -33,12 +33,38 @@ namespace GameBoy {
   typedef uint32_t uint32;
   typedef uint64_t uint64;
 
-  typedef int_t< 4> int4;
-  typedef int_t<15> int15;
-
+  typedef uint_t< 1> uint1;
+  typedef uint_t< 2> uint2;
+  typedef uint_t< 3> uint3;
   typedef uint_t< 4> uint4;
+  typedef uint_t< 5> uint5;
+  typedef uint_t< 6> uint6;
+  typedef uint_t< 7> uint7;
+
+  typedef uint_t< 9> uint9;
+  typedef uint_t<10> uint10;
+  typedef uint_t<11> uint11;
+  typedef uint_t<12> uint12;
+  typedef uint_t<13> uint13;
+  typedef uint_t<14> uint14;
   typedef uint_t<15> uint15;
 
+  typedef uint_t<17> uint17;
+  typedef uint_t<18> uint18;
+  typedef uint_t<19> uint19;
+  typedef uint_t<20> uint20;
+  typedef uint_t<21> uint21;
+  typedef uint_t<22> uint22;
+  typedef uint_t<23> uint23;
+  typedef uint_t<24> uint24;
+  typedef uint_t<25> uint25;
+  typedef uint_t<26> uint26;
+  typedef uint_t<27> uint27;
+  typedef uint_t<28> uint28;
+  typedef uint_t<29> uint29;
+  typedef uint_t<30> uint30;
+  typedef uint_t<31> uint31;
+
   template<uint16 lo, uint16 hi>
   alwaysinline bool within(uint16 addr) {
     static const uint16 mask = ~(hi ^ lo);
diff --git a/bsnes/gameboy/lcd/lcd.cpp b/bsnes/gameboy/lcd/lcd.cpp
index 78e85ea2..7d12d321 100755
--- a/bsnes/gameboy/lcd/lcd.cpp
+++ b/bsnes/gameboy/lcd/lcd.cpp
@@ -190,7 +190,7 @@ void LCD::render_obj() {
 }
 
 void LCD::power() {
-  create(Main, 4 * 1024 * 1024);
+  create(Main, 4194304);
 
   for(unsigned n = 0x8000; n <= 0x9fff; n++) bus.mmio[n] = this;  //VRAM
   for(unsigned n = 0xff40; n <= 0xff4b; n++) bus.mmio[n] = this;  //MMIO
diff --git a/bsnes/snes/audio/audio.cpp b/bsnes/snes/audio/audio.cpp
index 4b2f6861..eaea1c63 100755
--- a/bsnes/snes/audio/audio.cpp
+++ b/bsnes/snes/audio/audio.cpp
@@ -24,8 +24,8 @@ void Audio::sample(int16 left, int16 right) {
     system.interface->audio_sample(left, right);
   } else {
     dsp_buffer[dsp_wroffset] = ((uint16)left << 0) + ((uint16)right << 16);
-    dsp_wroffset = (dsp_wroffset + 1) & 32767;
-    dsp_length = (dsp_length + 1) & 32767;
+    dsp_wroffset = (dsp_wroffset + 1) & buffer_mask;
+    dsp_length = (dsp_length + 1) & buffer_mask;
     flush();
   }
 }
@@ -50,8 +50,8 @@ void Audio::coprocessor_sample(int16 left, int16 right) {
   r_frac = r_step - first;
 
   cop_buffer[cop_wroffset] = (output_left << 0) + (output_right << 16);
-  cop_wroffset = (cop_wroffset + 1) & 32767;
-  cop_length = (cop_length + 1) & 32767;
+  cop_wroffset = (cop_wroffset + 1) & buffer_mask;
+  cop_length = (cop_length + 1) & buffer_mask;
   flush();
 }
 
@@ -63,8 +63,8 @@ void Audio::flush() {
     uint32 dsp_sample = dsp_buffer[dsp_rdoffset];
     uint32 cop_sample = cop_buffer[cop_rdoffset];
 
-    dsp_rdoffset = (dsp_rdoffset + 1) & 32767;
-    cop_rdoffset = (cop_rdoffset + 1) & 32767;
+    dsp_rdoffset = (dsp_rdoffset + 1) & buffer_mask;
+    cop_rdoffset = (cop_rdoffset + 1) & buffer_mask;
 
     dsp_length--;
     cop_length--;
diff --git a/bsnes/snes/audio/audio.hpp b/bsnes/snes/audio/audio.hpp
index 3cd522fa..29d6dbae 100755
--- a/bsnes/snes/audio/audio.hpp
+++ b/bsnes/snes/audio/audio.hpp
@@ -8,7 +8,8 @@ public:
 
 private:
   bool coprocessor;
-  uint32 dsp_buffer[32768], cop_buffer[32768];
+  enum : unsigned { buffer_size = 32768, buffer_mask = buffer_size - 1 };
+  uint32 dsp_buffer[buffer_size], cop_buffer[buffer_size];
   unsigned dsp_rdoffset, cop_rdoffset;
   unsigned dsp_wroffset, cop_wroffset;
   unsigned dsp_length, cop_length;
diff --git a/bsnes/snes/snes.hpp b/bsnes/snes/snes.hpp
index f3498ee9..cc1ed8dd 100755
--- a/bsnes/snes/snes.hpp
+++ b/bsnes/snes/snes.hpp
@@ -1,7 +1,7 @@
 namespace SNES {
   namespace Info {
     static const char Name[] = "bsnes";
-    static const char Version[] = "075.05";
+    static const char Version[] = "075.06";
     static const unsigned SerializerVersion = 18;
   }
 }
diff --git a/bsnes/ui-gameboy/main.cpp b/bsnes/ui-gameboy/main.cpp
index e614b8ac..5dfca13c 100755
--- a/bsnes/ui-gameboy/main.cpp
+++ b/bsnes/ui-gameboy/main.cpp
@@ -38,7 +38,7 @@ void Application::main(int argc, char **argv) {
   audio.driver("ALSA");
   #endif
   audio.set(Audio::Handle, (uintptr_t)mainWindow.viewport.handle());
-  audio.set(Audio::Synchronize, true);
+  audio.set(Audio::Synchronize, false);
   audio.set(Audio::Volume, 100U);
   audio.set(Audio::Latency, 80U);
   audio.set(Audio::Frequency, 44100U);