[sdiy] 61 Note Keyboard from Electronic Goldmine

[Scott Stites]

Thank you, Byron!  It makes perfect sense now.  I don't think there's any
conductive foam under the keybed, but the ability to implement velocity is a
bonus I wasn't expecting from this keyboard.  

Cheers,
Scott


On Thu, 19 Jun 2003 00:17:20 -0400, "Byron G. Jacquot" wrote:

> This is the most common velocity implementation, two staggered switches.
> They're usually scanned with a microprocessor, and when the first switch it
> found closed, the processor starts a timer.  The amount of time between the
> two switch closures tells you how hard the key was hit...and it workes in
> reverse for key-up velocity.
> 
> Aftertouch is often with some touch sensitive foam under the keybed, with
> one sensor shared between all of the keys...you might look to see if it's there.
> 
> Byron Jacquot

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