Did you guys really think I was only going to post ONE thing tonight? So did I. But it turns out, you and I were both wrong.
I present you some simple mixer abstractions. This set consists of a mono input mixer-strip, a stereo input mixer-strip, and a master mixer-strip. Each strip has panning, volume, mute, and solo (except master, because that would be stupid). The channel strips automatically throw their outputs to the master, to ease patching, but you can turn it off if you like. Anyway, I think the help patch explains most of it.
These use the state-saving abstractions I posted earlier.
http://puredata.hurleur.com/sujet-5664-state-saving-abstractions