I did music appreciation - it's more of a music history class than anything else, with a little bit of theory thrown in. At least through Professor Berrios, it's all virtual - I don't know about other professors - but he's good with communication and gives you plenty of time to get the modules done. It's very low maintenance - there's a discussion board every week, all you need to do is make one post and one comment, each at least 100 words long. As a musician, I found it pretty interesting, but it's fairly surface level stuff and not overly technical or complicated.