Hello. Is there something for electric guitar, that can create the effect of a sustain pedal on a piano? I'd like to play a chord, and have it ring out while I move on to some lead lines. I assume I'll have to constantly be turning it on and off, so I have the effect for the chords, but not for the lead lines. And the sustain time would have to be adjustable. Basically something like a digital delay, but with a steady sustain instead of repeats. Any info on the best way to accomplish this appreciated.