[sdiy] calling for 606 /808 gurus

[Rob]

Okay already! I will tell you how I did it.. and it works btw.

OHH decay - replace r167 with a 1 meg pot in series with a 470k resistor.
CHH decay - put a 1 meg pot in series with a 1k resistor across C42.

Great FX!! using the two knobs, you can transpose which one is acting as the
CHH and which is the OHH and they will switch and cut each other off in the
same manner as if they had been actually switched in a pattern. The reason
they do this is because of the differential pair that is involved in cutting
off the OHH with the CHH.

It hasn't been fine tuned yet, but for me its fine. Changing the ohm values
of the pots and resistors might yeild better results, but I was impressed
with what I heard and I stopped there.

I will get off my dead rear end and post an audio example of a mundane patch
with the OHH and CHH being swapped around.

Rob

----- Original Message -----
From: "Dan Gendreau" <gendreau at rochester.rr.com>
To: "VINTVOLT" <VINTVOLT at terra.es>; "synthdiy"
<synth-diy at node12b53.a2000.nl>
Sent: Tuesday, February 27, 2001 11:39 AM
Subject: RE: [sdiy] calling for 606 /808 gurus


> >The equivalent resistor on the 606 is R6 (15K) but the upper terminal
> >is connected to the TEMPO CLOCK. Can Anybody explain this?
> >In the block diagram of the 606 you can see that the Envelope Shut off
> >block is controlled by the tempo clock!! Why, oh why??
>
>
> I believe it was designed this way to make the OH decay time dependent on
> the tempo.
>
> -Dan Gendreau.
>