[sdiy] Companders

[Scott Stites]

Hi Rene,
Yes, you're right, that's what originally got me thinking about the
companding.  The fact that the PT2399's minimum delay wasn't going into the
minimum delay range that a normal flanger uses diverted me down another path
of experimentation, using a different device (rhymes with DDB) =) for that
function.   I think the very low noise level of the PT2399 (< -90 dB) is
allowing me to get away without companding, though companding may be a way
to get some really clean longer delays out of it.  I am assuming that Scott
Swartz went with companding to emulate the characteristics of the classic
BBD in conjunction with the filtering that he employs in the circuit(?).
Now, Harry really needs to talk to this guy - he *wants* the sound of the
BBD =).

Anyway, this is one route that I'm taking to get that flange sound.  Waiting
in the wings is experimentation with PT2395 and manipulation of the RAM
address lines to get the really low delay range.

All of this when I really should be getting that basic synth together.  It's
all just so much fun.

Take care,
Scott

----- Original Message -----
From: René Schmitz <uzs159 at uni-bonn.de>
To: jhaible <jhaible at debitel.net>
Cc: <synth-diy at dropmix.xs4all.nl>
Sent: Sunday, September 01, 2002 2:11 AM
Subject: Re: [sdiy] Companders


> At 01:07 01.09.02 +0200, you wrote:
>
> >You are right. I didn't get that it was for a delay line.
>
> That was an assumption of mine, since I had seen the SA571 in the
> PT2399 delayline Scott recently mentioned here.
>
> Cheers,
>  René
> --
> uzs159 at uni-bonn.de
> http://www.uni-bonn.de/~uzs159
>
>
>
>