audio is getting closer?

lib/io.c

@@ -4,6 +4,7 @@
 #include <dma.h>
 #include <lcd.h>
 #include <gamepad.h>
+#include <audio.h>
 
 static char serial_data[2];
 
@@ -32,8 +33,7 @@ u8 io_read(u16 address){
     }
 
     if(BETWEEN(address, 0xFF10, 0xFF3F)) {
-        //ignore sound
-        return 0;
+        return audio_read(address);
     }
 
     printf("UNSUPPORTED io_read(%04X)\n", address);
@@ -73,10 +73,11 @@ void io_write(u16 address, u8 value){
     }
 
     if(BETWEEN(address, 0xFF10, 0xFF3F)) {
-        //ignore sound
+        audio_write(address, value);
         return;
     }
 
+
     printf("UNSUPPORTED io_write(%04X)\n", address);
 }