diff --git a/.vscode/settings.json b/.vscode/settings.json
index e351eb9..34ac8c4 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -5,6 +5,8 @@
         "string.h": "c",
         "common.h": "c",
         "ppu.h": "c",
-        "profileapi.h": "c"
+        "profileapi.h": "c",
+        "type_traits": "c",
+        "xtr1common": "c"
     }
 }
\ No newline at end of file
diff --git a/include/audio.h b/include/audio.h
index 016cf5d..43137da 100644
--- a/include/audio.h
+++ b/include/audio.h
@@ -17,6 +17,8 @@ typedef struct {
 
     u8 volume_left;
     u8 volume_right;
+    bool vin_left;
+    bool vin_right;
 
     u8 sq1_duty;
     u8 sq1_volume;
@@ -59,6 +61,7 @@ typedef struct {
     u8 sq2_env_timer;
 
     bool ch3_enable;
+    bool ch3_dac;
     u8 ch3_initial_len;
     u8 ch3_len;
     u8 ch3_volume;
diff --git a/lib/audio.c b/lib/audio.c
index 1e79b1c..65300ac 100644
--- a/lib/audio.c
+++ b/lib/audio.c
@@ -161,9 +161,10 @@ static int audio_callback(const void* input_uffer, void *output_buffer,
                 }
             }
         }
-
-        left *= (float)ctx.volume_left/7.0f;
-        right *= (float)ctx.volume_right/7.0f;
+        u8 left_vol = ctx.volume_left == 0 ? 1 : ctx.volume_left;
+        u8 right_vol = ctx.volume_right == 0 ? 1 : ctx.volume_right;
+        left *= (float)left_vol/7.0f;
+        right *= (float)right_vol/7.0f;
 
         left /= 4;
         right /= 4;
@@ -280,6 +281,7 @@ void audio_tick(){
             if(ctx.sq1_len >= 64) {
                 ctx.sq1_enable = false;
             }
+            printf("Len: %02X\n", ctx.sq1_len);
         }
 
         if(ctx.sq2_len_enable) {
@@ -291,7 +293,7 @@ void audio_tick(){
 
         if(ctx.ch3_len_enable) {
             ctx.ch3_len++;
-            if(ctx.ch3_len >= 64) {
+            if(ctx.ch3_len >= 256) {
                 ctx.ch3_enable = false;
             }
         }
@@ -399,7 +401,7 @@ void enable_square2() {
 
 void enable_wave() {
     ctx.ch3_enable = true;
-    if(ctx.ch3_len >= 64) {
+    if(ctx.ch3_len >= 256) {
         ctx.ch3_len = ctx.ch3_initial_len;
     }
     ctx.ch3_sample = 0;
@@ -420,13 +422,216 @@ void enable_noise() {
 }
 
 u8 audio_read(u16 address) {
-    return 0x00;
+    printf("read at %02X\n", address);
+    if(address == 0xFF26) {
+        u8 value = (ctx.audio_enabled << 7) | (ctx.ch4_enable << 3) | (ctx.ch3_enable << 2) | (ctx.sq2_enable << 1) | (ctx.sq1_enable);
+        return value | 0b01110000;
+    }
+    if(address == 0xFF25) {
+        u8 value;
+        value |= ctx.ch4_left << 7;
+        value |= ctx.ch3_left << 6;
+        value |= ctx.ch2_left << 5;
+        value |= ctx.ch1_left << 4;
+
+        value |= ctx.ch4_right << 3;
+        value |= ctx.ch3_right << 2;
+        value |= ctx.ch2_right << 1;
+        value |= ctx.ch1_right;
+        return value;
+    }
+
+    if(address == 0xFF24) {
+        u8 value = (ctx.volume_left & 0b111) << 4;
+        value |= (ctx.volume_right & 0b111);
+        value |= (ctx.vin_left << 7);
+        value |= (ctx.vin_right << 3);
+        return value;
+    }
+
+    if(address == 0xFF10) {
+        u8 value = (ctx.sq1_sweep_pace & 0b111) << 4;
+        value |= (ctx.sq1_sweep_direction) << 3;
+        value |= ctx.sq1_sweep_step & 0b111;
+        return value | 0x80;
+    }
+    if(address == 0xFF11) {
+        u8 value = (ctx.sq1_duty & 0b11) << 6;
+        return value | 0b00111111;
+    }
+    if(address == 0xFF12) {
+        u8 value = (ctx.sq1_initial_volume & 0b1111) << 4;
+        value |= ctx.sq1_env_direction_buffer << 3;
+        value |= (ctx.sq1_env_pace_buffer & 0b111);
+        return value;
+    }
+    if(address == 0xFF13) {
+        return 0xFF;
+    }
+    if(address == 0xFF14) {
+        return (ctx.sq1_len_enable << 6) | 0b10111111;
+    }
+
+
+    if(address == 0xFF16) {
+        u8 value = (ctx.sq2_duty & 0b11) << 6;
+        return value | 0b00111111;
+    }
+    if(address == 0xFF17) {
+        u8 value = (ctx.sq2_initial_volume & 0b1111) << 4;
+        value |= ctx.sq2_env_direction_buffer << 3;
+        value |= (ctx.sq2_env_pace_buffer & 0b111);
+        return value;
+    }
+    if(address == 0xFF18) {
+        return 0xFF;
+    }
+    if(address == 0xFF19) {
+        return (ctx.sq2_len_enable << 6) | 0b10111111;
+    }
+
+    if(address == 0xFF1A) {
+        return (ctx.ch3_dac << 7) | 0b01111111;
+    }
+    
+    if(address == 0xFF1B) {
+        return 0xFF;
+    }
+
+    if(address == 0xFF1C) {
+        return ((ctx.ch3_initial_volume & 0b11) << 5) | 0b10011111;
+    }
+
+    if(address == 0xFF1D) {
+        return 0xFF;
+    }
+
+    if(address == 0xFF1E) {
+        return (ctx.ch3_len_enable << 6) | 0b10111111;
+    }
+
+    if(address == 0xFF20) {
+        return 0xFF;
+    }
+
+    if(address == 0xFF21) {
+        u8 value = (ctx.ch4_initial_volume & 0b1111) << 4;
+        value |= ctx.ch4_env_direction_buffer << 3;
+        value |= (ctx.ch4_env_pace_buffer & 0b111);
+        return value;
+    }
+
+    if(address == 0xFF22) {
+        u8 value = (ctx.ch4_clock_shift & 0xF) << 4;
+        value |= ctx.ch4_lfsr_width << 3;
+        value |= (ctx.ch4_clock_divider & 0b111);
+        return value;
+    }
+
+    if(address == 0xFF23) {
+        return (ctx.ch4_len_enable << 6) | 0b10111111;
+    }
+
+    if(BETWEEN(address, 0xFF30, 0xFF3F)) {
+        return ctx.wave_ram[address - 0xFF30];
+    }
+    return 0xFF;
+}
+
+void reset_buffers(){
+    ctx.ch1_left = 0;
+    ctx.ch1_right = 0;
+    ctx.ch2_left = 0;
+    ctx.ch2_right = 0;
+    ctx.ch3_left = 0;
+    ctx.ch3_right = 0;
+    ctx.ch4_left = 0;
+    ctx.ch4_right = 0;
+    ctx.volume_left = 0;
+    ctx.volume_right = 0;
+    ctx.vin_left = 0;
+    ctx.vin_right = 0;
+    ctx.sq1_duty = 0;
+    ctx.sq1_volume = 0;
+    ctx.sq1_sample = 0;
+    ctx.sq1_period_reset = 0;
+    ctx.sq1_period_timer = 0;
+    ctx.sq1_enable = 0;
+    ctx.sq1_len_enable = 0;
+    ctx.sq1_sweep_pace = 0;
+    ctx.sq1_sweep_direction = 0;
+    ctx.sq1_initial_len = 0;
+    ctx.sq1_len = 0;
+    ctx.sq1_initial_volume = 0;
+    ctx.sq1_env_direction = 0;
+    ctx.sq1_env_direction_buffer = 0;
+    ctx.sq1_env_pace = 0;
+    ctx.sq1_env_pace_buffer = 0; 
+    ctx.sq1_env_timer = 0;
+    ctx.sq1_sweep_step = 0;
+    ctx.sq1_sweep_timer = 0;
+    ctx.sq1_sweep_enabled = 0;
+    ctx.sq1_sweep_period = 0;
+    ctx.sq1_calc_period = 0;
+    ctx.sq2_duty = 0;
+    ctx.sq2_volume = 0;
+    ctx.sq2_sample = 0;
+    ctx.sq2_period_reset = 0;
+    ctx.sq2_period_timer = 0;
+    ctx.sq2_enable = 0;
+    ctx.sq2_len_enable = 0;
+    ctx.sq2_initial_len = 0;
+    ctx.sq2_len = 0;
+    ctx.sq2_initial_volume = 0;
+    ctx.sq2_env_direction = 0;
+    ctx.sq2_env_direction_buffer = 0;
+    ctx.sq2_env_pace = 0;
+    ctx.sq2_env_pace_buffer = 0;
+    ctx.sq2_env_timer = 0;
+    ctx.ch3_enable = 0;
+    ctx.ch3_dac = 0;
+    ctx.ch3_initial_len = 0;
+    ctx.ch3_len = 0;
+    ctx.ch3_volume = 0;
+    ctx.ch3_initial_volume = 0;
+    ctx.ch3_period_timer = 0;
+    ctx.ch3_period_reset = 0;
+    ctx.ch3_len_enable = 0;
+    ctx.ch3_last_sample = 0;
+    ctx.ch3_sample = 0;
+    ctx.ch4_enable = 0;
+    ctx.ch4_initial_len = 0;
+    ctx.ch4_len = 0;
+    ctx.ch4_initial_volume = 0;
+    ctx.ch4_volume = 0;
+    ctx.ch4_env_pace = 0;
+    ctx.ch4_env_pace_buffer = 0;
+    ctx.ch4_env_timer = 0;
+    ctx.ch4_env_direction = 0;
+    ctx.ch4_env_direction_buffer = 0;
+    ctx.ch4_clock_shift = 0;
+    ctx.ch4_lfsr_width = 0;
+    ctx.ch4_clock_divider = 0;
+    ctx.ch4_len_enable = 0;
+    ctx.ch4_lfsr = 0;
 }
 
 void audio_write(u16 address, u8 value){
+    if(BETWEEN(address, 0xFF30, 0xFF3F)) {
+        ctx.wave_ram[address - 0xFF30] = value;
+    }
+
     if(address == 0xFF26) {
         ctx.audio_enabled = value & 0x80;
+        if(!ctx.audio_enabled) {
+            reset_buffers();
+        }
     }
+
+    if(!ctx.audio_enabled){
+        return;
+    }
+
     if(address == 0xFF25) {
         ctx.ch4_left = value & 0b10000000;
         ctx.ch3_left = value & 0b01000000;
@@ -441,9 +646,11 @@ void audio_write(u16 address, u8 value){
 
     if(address == 0xFF24) {
         ctx.volume_left = (value >> 4) & 0b111;
-        if(ctx.volume_left == 0) ctx.volume_left = 1;
+        //if(ctx.volume_left == 0) ctx.volume_left = 1;
         ctx.volume_right = value & 0b111;
-        if(ctx.volume_right == 0) ctx.volume_right = 1;
+        //if(ctx.volume_right == 0) ctx.volume_right = 1;
+        ctx.vin_left = value & 0x80;
+        ctx.vin_right = value & 0x8;
     }
 
     if(address == 0xFF10) {
@@ -454,10 +661,12 @@ void audio_write(u16 address, u8 value){
     if(address == 0xFF11) {
         ctx.sq1_duty = value >> 6;
         ctx.sq1_initial_len = value & 0x3F;
+        ctx.sq1_len = ctx.sq1_initial_len;
+        printf("initial len: %02X\n", ctx.sq1_initial_len);
     }
     if(address == 0xFF12) {
         ctx.sq1_initial_volume = (value >> 4) & 0x0F;
-        ctx.sq1_env_direction_buffer = (value & 0x8) == 0x80;
+        ctx.sq1_env_direction_buffer = (value & 0x8) == 0x8;
         ctx.sq1_env_pace_buffer = value & 0b111;
     }
     if(address == 0xFF13) {
@@ -475,10 +684,11 @@ void audio_write(u16 address, u8 value){
     if(address == 0xFF16) {
         ctx.sq2_duty = value >> 6;
         ctx.sq2_initial_len = value & 0x3F;
+        ctx.sq2_len = ctx.sq2_initial_len;
     }
     if(address == 0xFF17) {
         ctx.sq2_initial_volume = (value >> 4) & 0x0F;
-        ctx.sq2_env_direction_buffer = (value & 0x8) == 0x80;
+        ctx.sq2_env_direction_buffer = (value & 0x8) == 0x8;
         ctx.sq2_env_pace_buffer = value & 0b111;
         if(ctx.sq2_env_direction == 0 && ctx.sq2_initial_volume == 0) {
             ctx.sq2_enable = false;
@@ -498,11 +708,15 @@ void audio_write(u16 address, u8 value){
     }
 
     if(address == 0xFF1A) {
-        //ctx.ch3_enable = (value & 0x80) == 0x80;
+        ctx.ch3_dac = value & 0x80;
+        if(!ctx.ch3_dac){
+            ctx.ch3_enable = false;
+        }
     }
     
     if(address == 0xFF1B) {
         ctx.ch3_initial_len = value;
+        ctx.ch3_len = ctx.ch3_initial_len;
     }
 
     if(address == 0xFF1C) {
@@ -523,11 +737,12 @@ void audio_write(u16 address, u8 value){
 
     if(address == 0xFF20) {
         ctx.ch4_initial_len = value & 0b111111;
+        ctx.ch4_len = ctx.ch4_initial_len;
     }
 
     if(address == 0xFF21) {
         ctx.ch4_initial_volume = (value >> 4) & 0x0F;
-        ctx.ch4_env_direction_buffer = (value & 0x8) == 0x80;
+        ctx.ch4_env_direction_buffer = (value & 0x8) == 0x8;
         ctx.ch4_env_pace_buffer = value & 0b111;
     }
 
@@ -546,8 +761,4 @@ void audio_write(u16 address, u8 value){
             enable_noise();
         }
     }
-
-    if(BETWEEN(address, 0xFF30, 0xFF3F)) {
-        ctx.wave_ram[address - 0xFF30] = value;
-    }
 }
\ No newline at end of file