ref: 98da09b3e90b6a132ce6d2431999485593aef0c9
dir: /audio/music/nothing.asm/
Music_Nothing: channel_count 4 channel 1, Music_Nothing_Ch1 channel 2, Music_Nothing_Ch2 channel 3, Music_Nothing_Ch3 channel 4, Music_Nothing_Ch4 Music_Nothing_Ch1: Music_Nothing_Ch2: Music_Nothing_Ch3: Music_Nothing_Ch4: sound_ret