ref: bbc257476f9aac8d04d75a8036d412caa8f7d515 dir: /audio/sfx/swap_1.asm/
SFX_Swap_1_Ch5: duty_cycle 2 square_note 8, 14, 1, 1856 sound_ret SFX_Swap_1_Ch6: duty_cycle 2 square_note 2, 0, 8, 0 square_note 8, 11, 1, 1857 sound_ret