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

[Michael Dewberry]

This iPad keyboard uses magnets to simulate weight + IR sensing.

http://miselu.com/c-24/

On Fri, Jan 22, 2016 at 12:41 PM, nvawter <nvawter at media.mit.edu> wrote:

>
> Yes, I remember reading a paper on this a long time ago, perhaps even
> around 1996.
> I believe it was from Stanford.  They had made a small bank of keys, each
> one with servo actuator and
> feedback mechanism.  They were able to emulate several different pianos
> and other systems.
> I tried a quick search just now, but I'm at work and can't go in-depth.  I
> did find this, which has
> some inspiring pictures:
> http://web.stanford.edu/class/me327/lectures/lecture04-sensors_actuators.pdf
>
> There's also other work people have been doing in haptics in the
> high-frequency range like the comb
> teeth you mentioned.  My friend is working on one.  You can see the group
> project he's started here:
> https://hackaday.io/project/8446-weft-electrovibration-demo-board
>
> It's got some links to some papers at Disney, such as:
> http://www.disneyresearch.com/wp-content/uploads/REVEL.pdf    and
> http://www.disneyresearch.com/wp-content/uploads/teslatouchuist20101.pdf
>
> Anyway, just because it's been done once or twice doesn't mean it's over
> at all!  This is a humungous
> space to explore.  I know I've been spending months trying different
> methods of controlling synthesis
> based on FSRs.  The leap from piezo sensor to FSR is humungous.  There are
> so many possibilities and modes
> of expression, it drives me crazy.
>
> It would be nice if there were some kind of test platform for this stuff.
> What would it look like?
>
> Maybe a high-quality servo with a piano key on it and an FSR on the end of
> it...  then connected to some
> kind of block-diagram configurable interface like an Axoloti or analog
> modular?
>
> -Noah
>
>
> On 2016-01-21 18:09, cheater00 . wrote:
>
>> 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 or hydraulics.
>>
>> Either have electromagnets directly control the height of the key (in
>> opposition to the force exerted by your fingers) or use hydraulic
>> pistons feeding a reservoir, and have a small transducer constrict the
>> flow into and out of the piston (at which point you might even control
>> in and out separately).
>>
>> In addition to piano keyboards one might emulate all sorts of
>> different feels. Say, how it would feel if you were scraping a wooden
>> stick across a comb, or the feel of silly putty. This could feed a
>> synthesizer model - each physical interaction model could feed a
>> different synthesizer model.
>>
>> Also you wouldn't necessarily have to have the keys return
>> automatically. At which point you might want to think about making the
>> keys extend beyond the fulcrum - so that they can be pressed on one
>> end to press them inwards, and pressed on the other end in order to
>> depress them. For example, for ambient sounds, one might have a sort
>> of keyboard action that only very slowly returns the key - and the
>> height corresponds to the loudness of the note being played - while
>> letting you quickly stop a sound by pressing on the other end of the
>> keyboard.
>> _______________________________________________
>> Synth-diy mailing list
>> Synth-diy at dropmix.xs4all.nl
>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20160122/58d7898f/attachment.htm>