[sdiy] Vactrol'ed Moog Parametric !

[Dave Kendall]

Hi.

Voltage control would be extremely useful - creative for sound 
design/modular synth use, and very handy for automating the occasional 
EQ tweak during a mix.
Few analogue signal processors I've had the pleasure of working with 
have this sort of control possibility.
Most seem to be set up, and then leave - any manual changes are a pain, 
as they distract your concentration from the main job of listening as 
the mix is put to tape or disk.

Certainly for mixing, any small differences between bands would not 
present a big problem, as settings are mostly done by ear.
For mastering use, there is a case for greater precision.

If it were possible to have separate access to the I/O for each band,  
maybe using insert Jacks, VCAs could be used for setting the gain of 
each band.
Voltage controlled morphing between EQ settings, or different vocal 
formants......  Yum Yum!

  :-)

cheers,
Dave


On Nov 27, 2007, at 19:24, JH. wrote:

> I made some simulation of the Moog Parametric EQ, and it's an 
> interesting EQ
> indeed.
> Complete with side effects, like an ever so slight boost of the topmost
> audio range when you're setting an attenuation in the bass range ...
> I'm convinced it's something special, now. :)
>
> As for the potentiometers: We could emulate them with vactrols, and 
> adjust
> the different control law in the CV domain.
> Same with the reverse audio frequency pot.
>
> So, what about a circuit that has the charcter of the Moog ParaEQ, plus
> Voltage control over frequency and Bandwidth of each band, plus the 
> nice CV
> slewing Vactrols are famous for?
>
> Would that make an interesting PCB of its own?!
>
> JH.
>
>