Normal sound examples: 0:04 2x speed 1:06 no need speed, its normal 1:37 0.5x speed 2:03 0.25x speed Edit: if you put 0.25x speed in phase 4 0.5x speed it sounds like a chainsaw 0:20
Other fun facts is at 2 if you put 0.5x speed it exactly sounds like the Normal one and at 4 if you put 0.25x speed it exactly sounds like the Normal one
3 fun facts: If at 0.5x you put 2x it will sounds like normal If at 2x and you put 0.5x it will sound like normal If at 4x you put 0.25x it will sound normal