yes, i know how it sounds. i have a performance degree in jazz music and i am a professional musician. i like the sound and it can be very musical, believe me. you can for example use the samplerate reducer like a filter. so if you adjust the sample rate with an adsr on an attack you can get very nice results... of course it will not stay at 1000hz all the time, unless you want that kind of ring modulated aliasing sound. it is also unbelievably cool for bass sounds. so ok, not just for guitar but also for bass guitar and even synths...
i already built such a device with dedicated hardware (adc and dac chips), but i want to create a programmable version that i can control via midi.
so, back to the original question, is it possible to adjust the sample rate dynamically in the interrupt?