Basically, cutoff is the treble control, resonance adds harmonics and emphasis to the filter envelope as it is triggered. If you use basic waveforms (saw triangle square), this is how you shape the sound in the frequency spectrum. For instance you can't do a gong sound without the resonance. If you back off the cutoff (fewer high freqs) and increase the resonance, you should start to get overtones. As you increase the resonance the overtones will start to dominate the sound and the fundamental will disappear. It will start to sound like it's underwater. If you apply this to a complex sound such as a voice or instrument sample, you will either remove the high freqs (with loss of loudness) or make it sound like it's coming over a telephone (or worse). Perhaps a useful application is to apply a slow LFO to the filter cutoff (try this with drums) with the resonace set so that the sound doesn't start to oscillate (and ruin your mix) as more high freqs are added. The thing about the 760 filter is that is will self-oscillate, meaning the annoying whistling sound you get when you crank the resonance full. Back off the cutoff to make the sound more manageable. Also keep the velocity sensitivity of the filter down a bit till you get a handle on it. Ralph in Canada