this is really cool. i especially like the gesture mapping... using the distance between your hands for volume, their average height for pitch, and the angle between them for vibrato feels unusually intuitive. the fact that those dimensions can move independently makes this feel like it could support a lot more than a theremin sound

also - i made you some sounds with Underscore:

chill / evolving harmonic thing: https://underscore.audio/s/cmp_f2b79a32-57e/chord_lantern

chaotic / glitchier thing: https://underscore.audio/s/cmp_6abde2c8-2d9/morseMind

they're LLM-generated, web-embeddable synths, and the real-time controllable parameters can be defined in the prompt — so your hand tracking could map directly onto whatever controls make sense for the instrument

you can also generate more structured compositions like this: https://underscore.audio/s/cmp_9175f7d2-fe0/drifter_glimmer

happy to help you wire one up / iterate on some sounds if you're interested

disclaimer: i'm building Underscore :)