# speed up a song
sox slow.mp3 fast.mp3 tempo 1.6
#speed up a song and prevent clipping by lowering the volume
sox slow.mp3 fast.mp3 vol 0.25 tempo 1.6
# speed up a song
sox slow.mp3 fast.mp3 tempo 1.6
#speed up a song and prevent clipping by lowering the volume
sox slow.mp3 fast.mp3 vol 0.25 tempo 1.6