[sdiy] Emulating keyboard action with magnets; new synthesis method

[Florian Anwander]

Am 22.01.2016 um 00:09 schrieb cheater00 .:
> Reading up on the new Nord Piano 3, I was wondering if anyone ever
> tried to emulate the feel of a piano keyboard - how the resistance of
> a key changes depending on the state of the hammer mechanism, by using
> electromagnets
I remember the Frankfurt Musikmesse in 1992 or '93; there was a 
manufacturer of organ keyboards  (the real ones with the pipes 
behind...), who had built a prototype for a piano action keyboard, which 
worked only with magnets.
Under the key there was a kind of keel, which had a  magnet (m) on it 
(see ASCII-sketch below). On the bottom of the housing was another 
magnet (M), which simulated the weight of the key by its repulsion. But 
that could be done with springs too - so he positioned two additional 
magnets (x) aside and a little lower than the keel. It requires a 
certain initial pressure to overcome the force of these magnets - which 
is typical for a real piano, but is lacking on all electric pianos that 
I know. This was the best electrical keyboard I have ever played.
  ___
|key|
|___|
   |
   |
   m
x   x

__M__

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20160122/e6738449/attachment.htm>