[linux-audio-user] LADSPA SC2, SC3 Compressors and Sidechain

Russell Hanaghan hanaghan at starband.net
Sat Feb 14 10:50:08 EST 2004


On Sat, 2004-02-14 at 03:52, Steve Harris wrote:
> On Fri, Feb 13, 2004 at 11:09:10PM -0800, Russell Hanaghan wrote:
> > On Thu, 2004-02-12 at 22:56, Russell Hanaghan wrote:
> > > I could not get any noticeable function trying the sidechain inputs of
> > > these (I forget if it was specifically SC2 or 3 or 4 but could see the
> > > inputs in Jack-Rack)
> > > 
> > > I ran jack from Qjackctl, Ardour and jack-rack. Inserted SC3 into
> > > jack-rack. All routing was done from Qjackctl "Connect" interface. Tried
> > > every way to Sunday and could not get any effect except "makeup gain".
> > > Then I tried just patching SC2 then SC3, etc as inserts direct into an
> > > audio channel in Ardour for straight compression. Could not get them to
> > > do any standard compressing either.
> > > 
> > > Any thoughts or illumination on these compressors would be great. I
> > > particularly want to run a "de essing" of sorts on a single mike imput.
> > > Is it possible with these plugs??
> > > 
> > > Thanks
> > 
> > No takers??
> 
> Sorry, must have missed it first time tound. They do work (SC4 is used in
> JAMin), try setting low attach and decay times, winding the threshold right
> down the ratio right up and the knee to the middle and the peak/rms to
> peak.
> 
> If your audio is comming in at quite a low level you may not hear anything
> - this is a thinko on my part, analogue compressors expect signals > 0dB,
> but in digital systems this is unusual, so the range of the threshold is a
> bit narrow. A future release will have a lower min range.
> 
> - Steve

Thnx Steve..

What about the side chain inputs...Any info on how to use them as I
described? Like as de essing with pushed freqs from a seperate eq?

R~



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