From 645ae2f7d3743aa9d9bd0d9b38b6a510c73a7129 Mon Sep 17 00:00:00 2001
From: Samuel Walker <swalker@piwalker.net>
Date: Tue, 4 Feb 2025 11:45:09 -0700
Subject: [PATCH] stuff

---
 lib/audio.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/lib/audio.c b/lib/audio.c
index 619127d..20ec596 100644
--- a/lib/audio.c
+++ b/lib/audio.c
@@ -95,7 +95,7 @@ static int audio_callback(const void* input_uffer, void *output_buffer,
             if(ctx.ch3_period_timer >= 0x800) {
                 ctx.ch3_period_timer = ctx.ch3_period_reset;
                 ctx.ch3_sample = (ctx.ch3_sample + 1) % 32;
-                if(ctx.ch3_sample & 0b1) {
+                if((ctx.ch3_sample & 0b1) == 0b1) {
                     ctx.ch3_last_sample = ctx.wave_ram[ctx.ch3_sample >> 1] & 0xF;
                 } else {
                     ctx.ch3_last_sample = ctx.wave_ram[ctx.ch3_sample >> 1] >> 4;
@@ -291,10 +291,10 @@ void audio_tick(){
         }
 
         if(ctx.ch3_len_enable) {
-            ctx.ch3_len++;
-            if(ctx.ch3_len >= 256) {
+            if(ctx.ch3_len >= 255) {
                 ctx.ch3_enable = false;
             }
+            ctx.ch3_len++;
         }
 
         if(ctx.ch4_len_enable) {
@@ -409,12 +409,13 @@ void enable_wave() {
         return;
     }
     ctx.ch3_enable = true;
-    if(ctx.ch3_len >= 256) {
+    if(ctx.ch3_len == 255) {
         ctx.ch3_len = 0;
     }
     ctx.ch3_sample = 0;
     ctx.ch3_volume = ctx.ch3_initial_volume;
     ctx.ch3_period_timer = ctx.ch3_period_reset;
+    printf("channel 3 enabled\n");
 }
 
 void enable_noise() {
@@ -433,7 +434,7 @@ void enable_noise() {
 }
 
 u8 audio_read(u16 address) {
-    printf("read at %02X\n", address);
+    //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;