what are relations between crystal's frequency and pitch? What i mean is if I put, say, an 11Mhz crystal for switching, or even 5,5Mhz crystal for switching, would the whole sound go down one and two octaves down? Maybe that's a silly question, but two different crystals wouldn't be blendable to get gradual pitch shift, would they? Also, more than in oscillation, i'm interested in distortion and saturation of the signal, is the feedback mod good for this? I suppose I would need to adjust the trimpot differently then, right?