Hey guys. There is a setting for harmony on off but it's called harmony double It does not latch with standard petal and if you try it you better make sure to hit the petal again before you unplug it or it will not turn on or off with the manual button. just found out also there is a setting for lead voice on or off. again hit petal and make sure mic mute is working before unplugging. I am guessing this holds true for all foot petals settings.
MEL
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KORG PA1000, KORG PA900, 2 BOSE S1 PROS, 2 BOSE L1 COMPACTS, YAMAHA STAGEPAS 500, ROLAND VP7