ref: 21c266b950e5f4379bb7c3f605689b9070c8f48d dir: /audio/sfx/trade_machine_1.asm/
SFX_Trade_Machine_1_Ch5: duty_cycle 2 pitch_sweep 1, 5 square_note 15, 15, 0, 1264 square_note 15, 15, 2, 1616 pitch_sweep 0, 8 sound_ret