Rob:
Thanks for the detailed explanation. That clears up several issues. I may make the plunge, or wait out until the next upgrade to see what might be added. I’m using the Harmony Singer pedal now; but, have not been pleased with the clean, precise tracking needed from the guitar to make it work satisfactorily. Maybe it’s the player (me) at fault. Maybe the guitar tracking ability of the VL3X is better than that in the small, blue pedal. Don’t know. I’d really like a hands-free ability to concentrate on singing and lead work and not have to worry about playing each chord to trigger the harmonies. That’s why I inquired about whether the audio track could trigger the harmonies. Apparently, it will work like that. Amazing.