[sdiy] Soloist vs. Pro Soloist vs. DGX - was Best Filter piss ing contest

[Gene Stopp]

Direct hit Don!

No wonder I never really figured it out :) It's this one:

US Patent 3,930,429:
Digital Music Synthesizer


Ah ha! Here's the confusing part! You wrote:

"This is most of the circuitry of the ARP Pro Soloist and Pro DGX
synthesizers."

(or at least it looks like your comment...)

See? And Phil's page says the DGX used a 4027! I suppose it's possible that
the 4027 was used as the expo VCO in this servo-loop scheme, but that seems
like an awful waste of a perfectly good "real" VCO. Maybe they used rejects?
:)

Ex-ARP techs please come out of the woodwork...

- Gene


-----Original Message-----
From: Don Tillman [mailto:don at till.com]
Sent: Thursday, July 07, 2005 5:21 PM
To: Gene Stopp
Cc: synth-diy at dropmix.xs4all.nl
Subject: Re: [sdiy] Soloist vs. Pro Soloist vs. DGX - was Best Filter
pissing contest


   > From: Gene Stopp <gene at ixiacom.com>
   > Date: Thu, 7 Jul 2005 16:56:46 -0700 
   > 
   > Anybody have a decent rundown of how the Pro does it's keyboard
   > keypress to audio generation?

Hi Gene,

Check out my ARP Patents page:

  http://till.com/articles/arp/patents.html

(Of course!)

  -- Don

-- 
Don Tillman
Palo Alto, California
don at till.com
http://www.till.com