There was this crazy time about 5 years ago where I actually had free time. Time where I literally had nothing to do.
So I spent some time setting myself a few projects that I had no intention of finishing. And I didn't.
I found this when flicking though my files and thought if I tidied it up a bit it'd be alright to upload, even though I know FA's AUP changed so that unfinished works should go in scraps, this is as finished as it's going to get.
So I spent longer than I'd like to have coding a volume control system so people don't get deafened when they press play.
(I've always found it rather obnoxious when animations are at a fixed volume higher than you'd like them to be.)
Don't bother asking where I was going with it either... I was making it up as I went.

Oh and there seems to be a problem with the sound going out of sync if you switch tabs or windows... no idea how to fix this.
EDIT: With some jiggery-pokery I've fixed it.