slow down audio and get the correct playback speed
when you slow down audio before uploading to roblox, you need to adjust the playback speed in-game to make it sound normal again.
playbackspeed = 1 / slowdownfactor
example:
80% slowdown → 1 / 0.8 = 1.25
70% slowdown → 1 / 0.7 ≈ 1.42857
this helps bypass copyright detection while maintaining normal sound in-game.