Fairly complex device for something that's already in most MOTL and TOTL keyboards. And, you can set all those functions to a single registration, just one button push and you're ready to go.
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.)