Had my A-4 about a year now. Although I seldom use it (cause I can't carry a tune with a bucket) I've tried it from time to time. Sometimes it works, mostly not. Last few times it hasn't worked. I have the mic connected properly and the gain turned up but turning on the vocalizer and raising the slider does not work... nothing. Could there be something in one of the menus that got changed causing this or do I have a faulty vocalizer?

Gary