ref: 8d2afb7c1324adf6f6b70637a8300073c0a2cb81 dir: /audio/sfx/trade_machine_3.asm/
SFX_Trade_Machine_3_Ch4: duty 2 pitchenvelope 1, 5 squarenote 15, 15, 0, 1264 squarenote 15, 15, 2, 1616 pitchenvelope 0, 0 endchannel