[sdiy] Osc bank

John L Marshall john.l.marshall at gte.net
Fri Aug 2 02:00:08 CEST 2002

Good for you.

Ultra-precision 1V/Oct oscillators are not always required to make music.

Take care,
Pacific Northwest DIY Synthesizer meeting, July 20, 2002
See: www.sound-photo.com

----- Original Message -----
From: "Peter Grenader" <petergrenader at mksound.com>
To: <synth-diy at dropmix.xs4all.nl>
Sent: Thursday, August 01, 2002 7:20 AM
Subject: [sdiy] Osc bank

> Hi guys,
> Latest project:
> (don't laugh).  I happened by my local electronics shack the other day in
> search of TL072's, which I found and stumbled upon a kit of an audio range
> function generator for a whopping 8 bucks.  Very simple circuit:  One
> frequency pot, square, triangle and filtered sine waveforms.  bought four
> them.
> Built one.
> Not bad, not bad...definately not the answer to the world's problems at 8
> bucks a pop.  Within about an half hour, I had rigged up a frequency VC
> control and foound where to fabricate a saw output.  Then I got an idea:
> I'm goingt o biuld all four of these within a separate module.  They are
> going to have their own frequency pot, but they are going to share a VC
> input.  Each will have outputs for all four of the waveshapes and four mix
> outs for the 4 sines, 4 squares, 4 tri's and 4 saws.
> I think it'llcome in useful when I want clusters and I can slap it into a
> inch wide, 3 RU high space.  Each one of the function generator boards are
> about 1 x 1 inch!  I'm not going to worry about 1v/oct, i'm not going to
> worry about stability, I'm not going to worry about the absolute beauty of
> the waveforms - it's just going to be four voices that can be used when
> non-critical tracking is required.  I'll call it a Osc Bank of Uncertainty
> or something.
> tell me if I am nuts,
> Peter

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