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Re: [AN1x-list] Re: Sustain pedal

2001-02-21 by Bruce Wahler

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@...

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