Enhancement: "Playback Rate" changer in debug mode

[HammerHead133]

I've discussed different ideas with chart makers, and one idea that stuck out was a Playback Rate slider in the debug mode.

All this would do is add a way (probably a number box, like with bpm and note speed) to slow down the song and chart scroll speed while charting it, but NOT when actually playing it in-game. The best way I can describe it is something similar to the Playback Rate slider in Sony Vegas. It slows down or speeds up the video as you're editing it, but will not export the video with the changed playback rate.

This, along side the Write Notes feature, would make charting crazy voice patterns in songs a million times easier.

[Kade-github]

big thing is uh we need to change our audio handler to something that can actually change the rate of a song soo.

[nootnoot6989]

big thing is uh we need to change our audio handler to something that can actually change the rate of a song soo.

How hard would that be?