this is for RPM Challenge 2025

I experimented with writing a mass/spring/damper computer model. The intent was to use it to make a moderately large model to create sounds. I learned a lot about these sorts of models and how notoriously unstable they can be. The big battle for me was damping the network just enough to prevent run-away feedback, but not so much as to make static, unchanging sounds.

I have lots more work to do on this. I got some reasonable bell-like sounds and a few crazy chaotic ones. I used what I had to create two songs.

"Back And Birds" mixes a conventional bass instrument (in Garageband) with an unusual rhythm, plus some drums, a field recording of birds heard out my window, and one sound from the computer model played twice.