Jörg Piringer was kind enough to post information about his CMOS Synth controller including the Source code and the schematics. In a nutshell the project features a MIDI note to PWM ( Pulse Width Modulation ) micro-controller circuit with LEDs connected to a CMOS oscillators. Similarly the modulating LEDs can also be connected to circuit bent devices that use Photoresistors for pitch control or bend activation. Thanks!
[youtube]http://www.youtube.com/watch?v=WlSjoITgSI0[/youtube]