I am dissapointed with my purchase, The harmony fx does not work very well. I play a chord and the first chord is usualy fine, I then change to say a minor on the guitar and sing in the appropriate key but the pedal gives me a major instead of a minor, or it fluctuates on one of the tones as if trying to make up its mind. Its response seems slow as you change chords and is not accurate, it gets the harmony wrong most of the time, so I gave up using it and used the vocoder instead.
Dissapointed it does not do what it says on the box. Vocoder is great, harmony side not very good.

Jon.