For Scratch 3.0. It's funny working in the old editor again. Scratch is still the same program it's always been.. it's just the community that's changed. Or maybe the community hasn't changed. Maybe it's how involved in the community I've been that's changed. Anyways, use the left/right arrow keys to change the instrument and the up/down arrow keys to change the note. Space to hear tate note with the given instrument. (Shared to this account because whatever. If you haven't figured it out yet I mostly use @_nix now.)