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Subject: Re: [AN1x-list] Re: Sustain pedal

From: Bruce Wahler <bruce@...>
Date: 2001-02-22

Reggie,

>Going back to this I made a mistake, the pedal I got has a 22k pot on it
>and the peavey takes a 10k pot, this may explain why it aint working
>properly!! Oh well, Back to the shop tomorrow.....

The difference between a 10K pot and a 22K pot, from a working perspective,
shouldn't be all that great. I've used 10K and 50K pedals pretty much
interchangeably -- the only result of a mismatched pedal is usually a
slightly non-linear action; i.e, the top end will plateau at 90%, or the
bottom end will crash in the last 10%, something like that.

More likely, you're fooling the auto-sense circuit in the Peavey -- or it's
the pinout issue that I mentioned. Actually, as an engineer, I can't
understand how an auto-sense can work on a "wah" (expression) pedal. On a
sustain pedal, it's easy: Assume that the pedal is not depressed at
startup, and it either looks open or closed at that time; then if it's the
wrong way, compensate. An expression pedal is more complicated: How can
the software determine if the pedal is all the way down, all the way up, or
somewhere in between? I'd be willing to bet that the auto-sense only works
for sustain pedals.

Peavey keyboards are made by Fatar -- at least, the key action is -- and
Fatar used the opposite convention as Yamaha.

Regards,

-BW

--
Bruce Wahler
Design Consultant
Ashby Solutions"
www.ashbysolutions.com
CloneWheel Support Group moderator
978.386.7389 voice
978.776.0096 fax
bruce@...