I noticed a few hours ago that I wanted to listen to a bunch of acts at Coachella that were on different channels. I didn't really want to have to remember to switch, though, so I hacked this together so that I could select all the acts I want to listen to and it would just switch between them for me when they came on.
https://coachella-streamer.herokuapp.com/?ids=8,12,16,17,19,... is my planned listening for the weekend. Hope someone else finds this useful!