This is Grelmo, a project that I have been working on for a while with the help of the Internet and a few friends. It's like an even more primitive NES-style sound engine, but with MIDI. Some features:
2xPWM Oscillators with shared LFO 1xTriangle Wave Oscillator 1xNoise gen 4xADSR envelope gen MIDI control of voices on channels 1-4 Full control of all parameters through MIDI CC messages as documented in the code.
Source code and demo videos are at: grelmosynth.blogspot.com
Information about related projects will be posted soon as well.
Thanks, please let me know what you think!