[sdiy] Synton Syrinx

Dave Manley dlmanley at sonic.net
Fri Sep 2 23:31:29 CEST 2016

On September 2, 2016 1:16:23 PM PDT, Donald Tillman <don at till.com> wrote:
>> On Sep 2, 2016, at 12:38 PM, Rick Jansen <rick.jansen at xs4all.nl>
>>> Didn't ARP put their VCF in resin to hide it was a copy of the Moog
>> On Sep 2, 2016, at 1:02 PM, rsdio at audiobanshee.com wrote:
>> Hmm, if ARP hid their VCF circuit, then how did they ever get caught?
>> I assume that they did not actually anticipate being sued. If they
>did anticipate the lawsuit and then went ahead with a copyright
>infringement thinking that hiding it would somehow work, then it sure
>seems like an epic fail. Probably a ton of urban legend around this
>ARP hid most of their core circuitry in potted submodules for a while;
>VCO, VCO Waveforms, VCF, VCA, Ring Modulator, etc.
>    http://www.arptech.synth.net/modmain.htm
>It's possible to open the submodules up, but it's a lot of work.  ("I'm
>never doing that again...")
>  -- Don
>Don Tillman
>Palo Alto, California
>don at till.com

I always suspected the modules
/potting were a carry over from Pearlman's early discrete opamp design work at Philbrick and Nexus Research?  Put the sensitive stuff in a sometimes shielded box and pot it so its all at the same temp, no drafts, etc?

Sensitive could also mean borrowed IP in this case.  :-p


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