Michael Raiford wrote:

> Hmm. Found off the Wurlitzer video. @ approx 2:30 all of the knobs on 
> the console just change , changing the timbre of the organ. This is a 
> church organ, but looks to be a pretty good size one.

Yeah. Somebody pressed a thumb piston or a toe piston. That's what those 
do - change to a preset combination of stops with just one press.

These are obviously more common on organs that are electronically 
controled. (Usually they're then programmable.) But they exist even on 
many purely mechanical organs. (Then they are preset when the organ is 
built.)

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