Give people a list of [musicians] and ask them to choose one person whose music they do not know. Their task is to find music by that person online, listen to it, choose one and post a link (or the video/audio itself) in the online group with a comment about the music. Players are then asked to listen to each other's chosen music and add their own comments, to which the original poster should reply.
You can add a layer by asking people to research the background of the musical piece or the musician and post a summary. This can be very good practice for simple citation.