audio-player: comments for byte conversions

cmd/audio-player/adpcm.js

@@ -127,14 +127,17 @@ function decode(b) {
 	return result;
 }
 
+// int16ToBytes takes a number assumed to be an int 16 and converts it to an array containing bytes (Little Endian).
 function int16ToBytes(num) {
 	return [(num & 0x00ff), (num & 0xff00) >> 8];
 }
 
+// bytesToInt16 takes an array of bytes (assumed to be values between 0 and 255), interprates them as little endian and converts it to an int16.
 function bytesToInt16(b) {
 	return (b[0] | (b[1] << 8));
 }
 
+// bytesToInt32 takes an array of bytes (assumed to be values between 0 and 255), interprates them as little endian and converts it to an int32.
 function bytesToInt32(b) {
 	return (b[0] |
 		(b[1] << 8) |