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I looked up the manual for the Digitech vocalist VL3D, and it allow midi CC comands, and support harmony on/off, patch change, and many more that could be very useful live with RB as a midi track with CC commands could be included in a song to make appropriate program changes during a song. Having the harmony come in and even chage at specific points could be very powerful.



Hi Rob. The purpose of the midi control is to control the harmony only. To my knowledge, at least, in the products I can afford, midi doesn't have any auto start/stop to it. The only way you can do that is to have midi tracks with the harmonies set on separate tracks. But I don't know if that will activate the harmonies. I think you still have to activate them with a foot switch in order to turn them on. When on and there is no midi or guitar coming thru the harmonizers, then the harmonies will play off key. They have to be turned on and off manually some how. The way these midi controlled harmonizers work is that they read the midi chords and come up with an algorithm that lets them create harmony sounds. Sometimes the notes are off key or not proper when midi controlled. Even my guitar controlled pedal will cough up a sour note every once in awhile. Also, there is a tiny bit of lag in the harmony tracks. When used live there's no way to control that. When recording, I can use voodoo to sync 'em up. But it's not noticable when performed live like it is when recorded.

Danny and I both own the DigiTech Vocalist 4's. They only work with guitar signal going thru the pedal and when the foot switch is turned on by stepping on a pedal. I suppose that the very expensive TCHelicon ($3000 price range and up) can, thru the use of controllers, be ordered to engage and disengage when a midi signal is encountered. But the cheapo stage models, to my knowledge, don't sport that feature.

Hope that helps.

Russ
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