diff --git a/APU.cpp b/APU.cpp
index 599613a..9699b9f 100644
--- a/APU.cpp
+++ b/APU.cpp
@@ -1,6 +1,6 @@
 #include "APU.h"
 #include <SDL2/SDL.h>
-#include "audio_viewer.h"
+//#include "audio_viewer.h"
 
 namespace APU
 {
@@ -98,11 +98,11 @@ namespace APU
 
     void init()
     {
-        SDL_AudioSpec audioSpec{SAMPLING_FREQ, AUDIO_U8, 1, 0, AUDIO_BUFFER_SIZE>>2, 0, 0, &audioCallback, NULL};
+        SDL_AudioSpec audioSpec{SAMPLING_FREQ, AUDIO_U8, 1, 0, AUDIO_BUFFER_SIZE>>1, 0, 0, &audioCallback, NULL};
         sdlAudioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, NULL, 0);
         resume();
         //samples_time=SDL_GetTicks();
-        audio_viewer::init();
+        //audio_viewer::init();
     }
 
     void reset()
@@ -437,7 +437,7 @@ namespace APU
             uint8_t sample = (sampleCH1+sampleCH2+sampleCH3+sampleCH4)&0xff;
 
             sound_buffer[(sound_pos++)&(AUDIO_BUFFER_SIZE-1)] = sample;
-            audio_viewer::addsample(sample);
+            //audio_viewer::addsample(sample);
             //if (ear) last_1 = sound_pos;
         }
      }
diff --git a/Makefile b/Makefile
index 722780c..7b5b1d4 100644
--- a/Makefile
+++ b/Makefile
@@ -9,3 +9,6 @@ debug: compile
 
 debug1: compile
 	gdb -ex run gb
+
+release:
+	g++ -O3 *.cpp -lSDL2 -o gb
diff --git a/main.cpp b/main.cpp
index 80d60c5..804cc31 100644
--- a/main.cpp
+++ b/main.cpp
@@ -63,7 +63,7 @@ int main(int argc, char *argv[])
     if (argc < 2) { printf("ABORTING: No rom specified.\n"); exit(1); }
 
     const uint32_t clock = 4194304;
-    const uint32_t update_freq = clock / 10;
+    const uint32_t update_freq = clock >> 3;
 
     SDL_Init(SDL_INIT_EVERYTHING);
 
@@ -204,7 +204,7 @@ int main(int argc, char *argv[])
 
             if (t_states>=update_freq)
             {
-                while (SDL_GetTicks()<time+100) {}
+                while (SDL_GetTicks()<(time+125)) {}
                 t_states -= update_freq;
                 time = SDL_GetTicks();
                 //z80analyze::refresh();