[analogorgans] Re: activity
- From: "Robert G. Danka" <bobtv@xxxxxxxxxxx>
- To: <analogorgans@xxxxxxxxxxxxx>
- Date: Thu, 30 Aug 2007 18:13:18 -0400
Hi Milt,
It causes the generators to be just a little unstable imitating the natural
unsteadiness of wind supply in pipe organs. It is a very gentle shaking of the
pitches. And you really have to listen for it because if you don't know it's
there, you won't hear the shaking. But it does help the ensemble because it is
entirely random unlike the chorus. It is so effective though that Walker took
it one step farther by designing a digital activity for the analog organs that
imparted different rates and depths for the individual keyers so flute activity
was different than principal etc. When Walker would voice an organ that was
the first thing he would add was the activity circuit. This is an old trick
that dates back to the 110 and 220 era.
Bob Danka
----- Original Message -----
From: milton miller
To: analogorgans@xxxxxxxxxxxxx
Sent: Thursday, August 30, 2007 5:16 PM
Subject: [analogorgans] Re: activity
i had a 770 in my home what did the walker circuit do for it? milt
detroit
"Robert G. Danka" <bobtv@xxxxxxxxxxx> wrote:
While I think about it, does anyone out there have a schematic for that
little analog activity circuit that Bob Walker used to install in the analog
organs? This is for an older 770 with an extra set of LC oscillators used as
ensemble generators.
Thanks,
Bob Danka
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