[sdiy] Aftertouch via Pressure

[Ken Stone]

That CMOS foam was all the rage for presure sensors at one time.
Unfortunately, it seems to have a limited life. Any I have here with chips
in it has gone bad. It perrishes, and even worse, becomes corrosive.

Ken

>Yes ARP Soloist and Pro Sololist use CMOS foam under the hinged keyboard as
>the pressure sensor. I forget what the Multimoog uses but I think it's the
>same approach. Not sure about the ARP Pro DGX because I don't have one, but
>I'll bet it's CMOS foam too. Hey I was at an ARP demo, at ABC Music in
>Burbank back when I was in high school. Boy was that neat. Helped to put me
>on this nutty road I'm on for life. The first first first wake-up call I
>ever got was at Springfield Music in Northridge, where my buddy and I rode
>our bikes to, and there was a Minikorg and a Synthacon in there. I'd like to
>find both of those someday but the ebay prices at the moment are just too
>steep.
>
>- Gene
>
>
>-----Original Message-----
>From: harrybissell [mailto:harrybissell at prodigy.net]
>Sent: Thursday, July 10, 2003 1:16 PM
>To: Glen
>Cc: jhaible at debitel.net; The Peasant; synthdiy at sdiy.org;
>xyzzy at sysabend.org
>Subject: Re: [sdiy] Aftertouch via Pressure
>
>
>If you are willing to hinge the entire keyboard.... then optical, and
>resistive
>methods
>are easy as well.
>
>iirc (but it has been a long, long time) the ARP ProSoloist had aftertouch
>from
>a mechanically
>pivoting keyboard...  otoh that one I saw was the FIRST time I saw any
>synthesizer in the flesh... along with the Odyssey and 2600 models.  (high
>school demonstration)
>
>H^) harry
>
>
_______________________________________________________________________
Ken Stone   sasami at hotkey.net.au  
Modular Synth PCBs for sale <http://www.blaze.net.au/~sasami/synth/>
Australian Miniature Horses & Ponies <http://www.blaze.net.au/~sasami/>