In order to have your problem diagnosed, you'll need to provide us with a lot more information.
What kind of speakers, what type of keyboard, where are you plugged in for the output, and lots more.
Good Luck,
Gary
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Travlin' Easy
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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.)