I've a few "learn the violin" CDs like that. Solo instrument on one channel, band/orchestra on the other. As you get better at playing it, change the balance.
Not so essential for classical music, since music notation pretty much marks exactly what you should play, but great for folk or jazz when there's a lot of "unwritten" style knowledge that you need to learn.
We've found it to be the "least bad option" for DnD. Have a Discord window open for everyone to video chat in, have a browser window open with Owlbear Rodeo or Foundry / Forge for your tokens and character sheets, all works smoothly enough. The text chat is sufficient for sending the DM a private message; for group chat to share art of the things you've just run into or organise the next session.
Completely agree that for anything "less transient", then the UX is beyond awful and trying to find anything historical is a massive PITA.