It will sound different to HD500 but what you're describing is possible.   For the clean/ambient thing: Fender amp and cab (or turn off amp/cab for DI) plate reverb delay dual pitch block (you can run both the octave up and octave down in a single block You always have volume pedal, wah, eq on every preset There is now still one open block to do whatever you want with it If you want separate control of the octave up/down you could eithe