Re: [sc-users] sc2, Compander advice..

[Stephan Wittwer <s@xxxxxxxxxx>]

The following information from the archive I find relevant:


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Date: Sun, 29 Sep 2002 12:24:57 -0700
From: James McCartney <asynth@xxxxxx>
Subject: Re: [sc-users] compander


at the threshold amplitude, dB in == dB out
slopeBelow is the slope of dBout/dBin below the threshold,
slopeAbove is the slope of dBout/dBin above the threshold.

So if the threshold is 0.5 and slopeBelow is 1 and slopeAbove is 0.2,
then
below the threshold a change in dB in results in the same change in dB
out.
Above the threshold it would require a 5 dB change in dB in the input
to result in a 1 dB change in the output.

Thus this kind of setting results in limiter behaviour.

...


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Date: Mon, 04 Jun 2001 13:33:17 -0400
From: "crucial" <felix@xxxxxxxxxxxxxxxxxxx>
Subject: Denomalize and Compander blowups

James, 
I discovered that the Compander doesn't blow up if i submit the key as

Compander.ar( input, input.max(0.001),etc...)

When the compander gets weird stuff (especially 0.0, 0.0,0.0.... pure
silence ),
it blows up and takes all audio with it.

...

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Jeremiah T. Isaacs schrieb am 06.12.2002 20:18 Uhr unter jti@xxxxxx

> 
> I looked thru the old archive with no luck.  Any advice on using
> Compander?  I just want to use it for some gentle compression on a
> finished track.
> 
>> From messing around with Compander and a gui, it seems that slopeAbove is
> the compression ratio, but a 2:1 ratio would be 0.5.  is this correct?

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