I think I figured it out--not the metronome though. It has an indicator light and on/off switch that I would instantly see. It has something to do with the program that was used to adjust the volumes.

Gary
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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!

K+E=W (Knowledge Plus Experience = Wisdom.)