I think my electromechanical synth is way more interesting. It's a coat rack with 2 strings with stereo pickup, and played using a rotary magnetic bow, which is an Open Sound Controlled drone motor with a 3D printed wheel with an arrangement of magnets. Only the spinning magnetic field of the bow touches the strings. It is played by subtly controlling the velocity of the wheel. I call it an electroduochord.

Here's a set I played with it. https://youtu.be/nKFK_OhQv3k (Wireless soft-pot controller as well as wireless "hat" controller that uses accelerometers)

And here is the recent design of a rotary magnetic bow wheel with balanced irrational angled arrangement of magnets to reduce harmonic locking. https://www.instagram.com/p/Cr4ZXGztY27/

Here's the OSC Rotary Magnetic Bow code... https://github.com/spDuchamp/OSCRMB

And here is an album made autonomously using an algorithm built in Puredata to control the bow based on the output sound in a feedback loop. https://stefanpowell.bandcamp.com/album/autonomous-drone-lul...

Here is an autonomous recording session... https://www.youtube.com/live/LpQBtJmrez8