[sdiy] Weird Vocoder project

[Andre Majorel]

On 2007-05-28 09:07 -0400, John Mahoney wrote:

> Can you provide any info on the super-simple Korg VCA? Assuming
> that Rig wants to forge ahead with his project.

There was a thread about that on 2007-01-08 ("Simple VCA
schematic, anyone?") by martin = silvercircle + se.

This is the circuit. Not tested !

   IN  o---
(-5~+5V)   |
           <                                         ----^v^v----
      9.9k >                            1µ          |    100k    |
           <   _                        _           |    _       |
           | +  | -                   +  | -        |   | -_     |
           +---||---+----       ----+---||---^v^v---+---|-  -_   |
           |   _|   |    \     ^    |   _|    1k        |TL071>--+---o  OUT
           <        <     \   /     <                 --|+ _-
       100 >  33µ   > 330 =====     > 100k           |  |_-
           <        <       | BC550 <                |
           |        |       |       |               _|_
          _|_       = 470p  |      _|_
                    |       |
     VC  o---^v^v---+-------
(0~15V)       1M

-- 
André Majorel <URL:http://www.teaser.fr/~amajorel/>
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