basic audio stream.

include/audio.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <common.h>
+
+typedef struct {
+    float sq1_freq;
+    float sq1_duty;
+    float sq1_amp;
+    float sq2_freq;
+    float sq2_duty;
+    float sq2_amp;
+} audio_context;
+
+void audio_init();