[sdiy] Osc bank

[Peter Grenader]

I tell ya what, if I were to release a VCO to the world,  while I may have a
single 1/V oct VC input, I would definately have another with on-board
bi-polar attenuation for both positive (non-inverted) and negative
(inverted) side.

Ideally, I would have two inputs like this using a pot that had a switch on
one end (like Wiard's Borg filter) that when the uiser 'clicked' in, only
then would the input be scaled to 1V/oct.

but that's me.

Peter


 on 8/2/02 10:37 AM, Michael Ruberto at frankentron at hotmail.com wrote:

> I built my dual VCO module a year and a half ago and I still haven't
> bothered to calibrate the 1V/Oct response. I have gotten used to them the
> way they function now so it looks like I will have to keep them this way.
> I'll calibrate the next VCO module I build so I can have the ability to make
> "real" music also ;-)
> 
> ~M
> 
> 
>> From: "John L Marshall" <john.l.marshall at gte.net>
>> To: "Peter Grenader" <petergrenader at mksound.com>,
>> <synth-diy at dropmix.xs4all.nl>
>> Subject: Re: [sdiy] Osc bank Date: Thu, 1 Aug 2002 17:00:08 -0700
>> 
>> Good for you.
>> 
>> Ultra-precision 1V/Oct oscillators are not always required to make music.
>> 
>> 
>> Take care,
>> John
>> ---------------------------------------------------------------------------
>> 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
>> of
>>> 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
>> all
>>> going to have their own frequency pot, but they are going to share a VC
>> Freq
>>> 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
>> 3
>>> 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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