ref: 7c3a90bf0181127fab4cd98ad4a3173a2984f51e dir: /audio/sfx/trade_machine_1.asm/
SFX_Trade_Machine_1_Ch4: duty 2 unknownsfx0x10 21 unknownsfx0x20 15, 240, 240, 4 unknownsfx0x20 15, 242, 80, 6 unknownsfx0x10 8 endchannel