Has anyone figured out to use the vocoder on the HD500? I think it might be interesting but I can't get anything out of it. I've set the guitar input to 1 and the mic to 2 and while I hear the mic, I don't hear any reaction between the guitar notes and the mic. If someone has created a patch that works that would be helpful.
You are doing something wrong.
Don't set mic to input 2. That doesn't effect. Just plug into the MIC - connection! The rest will do the effect.
Place the effect directly behind the amp because it makes sense for the tone.
Or see here