Hi Guys, Galls. I've put some work on guitar synth on GuitarSynth (https://github.com/geraldmwangi/guitarsynth-dpf). There is a new parameter per synth called overlay input. What it does is it multiplies the synth signal with a scaled version of the input audio. That way the synth sound is attenuated by the guitar sound, making it more 'guitarish' sounding. I would like to hear your thoughts on it. Remember when testing to turn up the gain of the synth in question, as well the input gain on the soundcard/alsamixer. Work on the polyphonic pitch detection is come to a halt, since I'm wrapping up my PhD, but don't sigh: I'm still reading into the matter and have some ideas.. Gerald /JimsonDrift