The Orca Synth - A photocell light controlled digital synthesizer, played like a Theremin.

Digital music synthesizer created in the "circuit bent" style, uses two photocell light sensors to create synth notes in any selectable key.
Each photocell controls notes for one voice of the synthesizer, each voice can be modified separately.
1. Octave control: selects 1-4 octaves for each voice.
2. Modulation effect control.
3. Control note length of each voice.
4. Waveforms: Square, Sine, Triangle, Ramp, Noise.
5. *Select 12 different keys.
6. A chorus effect.
7. Note pulse effect.
Some of the sounds remind me of the sonar sounds made by whales, hence the name Orca Synth.

[@korywesterhold]

I’m shocked at how musical and rhythmic this is with the modulation! Absolutely stunning 🤯 curious if it would be possible to clock the lfo/modulation somehow

[@tronixsynth]

Thank you. The software uses direct digital synthesis using a lookup table of note frequencies, so all I did was map out the frequencies of the notes in the major and minor pentatonic scales. The modulation is all being done in software too. (By "software" I mean the firmware programmed into the main chip).