Or, try to find an old PSR-5700, it had sliders and knobs. But that was a long time ago, and it weighed a ton.

Gary cool
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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.)