[sdiy] 3 chip Analog Tracking Generator

[Grant Richter]

Sorry if I stole your thunder! A clear case of plagiarism by anticipation!
;^)

I didn't put any restrictions on use of the design. Don't worry about using
something similar in a module.

Actually, you don't need the pots at all. Just use 82.5K 1% resistors to
each open collector and adjust the value of the gain resistor at the summer.
Put in Bar mode, each step that goes low will add another 83 mv to the
output, for 0-10 semitones with just one trimmer and one op-amp.

The same technique could be used to quantize arbitrary scales. Say 3 taps
are semi-tone weighted, 3 are whole tone, 3 are octave weighted. A random
voltage input would produce a quantized scale over 3 octaves.


> From: "Theo" <t.hogers at home.nl>
> Reply-To: owner-synth-diy at node12b53.a2000.nl
> Date: Fri, 9 Feb 2001 03:23:33 +0100
> To: <grichter at asapnet.net>, <synth-diy at node12b53.a2000.nl>
> Subject: Re: [sdiy] 3 chip Analog Tracking Generator
> 
> Hi Grant
> I recently designed a 10 level quantizer based on the 3914.
> My intension is to make this circuit available as a kit.
> Basically this is the same circuit as yours, only without the dither osc.
> and with added fine tuning pots.
> The module is part of a modular analogue sequencer, the modules are D.D.
> (Donald Duck?) compatible.
> 
> With al the talk about stealing circuits going on SDIY I though it was best
> to post this to the list.
> Regards,
> Theo
> 
> ------------------
> ----- Original Message -----
> From: Grant Richter <grichter at asapnet.net>
> To: <owner-synth-diy at node12b53.a2000.nl>; <synth-diy at node12b53.a2000.nl>
> Sent: Friday, February 09, 2001 2:28 AM
> Subject: [sdiy] 3 chip Analog Tracking Generator
> 
> 
>> A 3 chip, 10 segment analog tracking generator/sequencer/quantizer
>> 
>> http://www.musicsynthesizer.com/DIY/Grant/CVtwister.html
>> 
>> 
>> 
> 
>