ref: b8b5ab5e6628dec9e8c88020e39975157cb0a0a6 dir: /audio/sfx/trade_machine_1.asm/
SFX_Trade_Machine_1_Ch4: duty 2 pitchenvelope 1, 5 squarenote 15, 15, 0, 1264 squarenote 15, 15, 2, 1616 pitchenvelope 0, 0 endchannel