SoundBehavior is done and should work, though still pending testing. I’ve modeled it after the AnimationBehavior I did a couple of months ago, and it should be extremely powerful and flexible in exactly the same way. I even found some old bugs in the AnimationBehavior I missed on my first go in the process.
There are a number of additional concerns for music, so I’ll be figuring out how to tackle that starting tomorrow. Hopefully I can come up with some more bright ideas.