A friend just donated a stack of really interesting LPs (thanks Annie!). As I work through them (right now I’m listening to “The Late Fourteenth Century Avant Garde” — I love medieval music) I notice that I have to get up every 20-30 minutes to change sides. Isn’t that what all the ergonomic experts recommend? That you get up and change your posture regularly? There’s a market for software that reminds you to do this, but it turns out you can do the same thing with a phono turntable.