You can pause your music! [space] to stop music and [p] to resume This is super easy, but very glitchy-at least the noise because its just sections of music playing after another. Scratch doesn't have a great way to end music, if you try yourself, you'll notice there's a quick pop at the end of the sound/music (I've tried and couldn't get rid of it even after deleting sections)
⚠️WARNING LOUD⚠️ May start popping :P
