help with Side Chain Compression

adam faranda adam.faranda at
Thu Oct 2 16:48:25 BST 2008

Yeah, you can do it entirely in ardour; I put the compressor on it's own
bus (SC1 -- 2 channels -- aux for the side chain, and one
channel for compression)  and had my drum track and a constant volume sine
tone on separate mono tracks. I routed the drums into the side chain input,
and the sine tone into the main input and Lo and behold, the drum track did
indeed modulate the amplitude of the sine tone, albeit somewhat weakly.
However now its just a matter of playing with parameters to get the right
sound; I may also try doubling the compression by chaining two instances of
SC1 together.

On Sun, Sep 28, 2008 at 3:54 AM, <hollunder at> wrote:

>  On Sat, 27 Sep 2008 23:15:10 -0400
> "adam faranda" <adam.faranda at> wrote:
> > I noticed that there are four LADSPA plugins, named "SC1, SC2, SC3,
> > and SC4", which I am hoping different types of side chain
> > compressors. I was experimenting a little with SC3, but I couldn't
> > get any noticeable results; here's what I did:
> >
> > I created two tracks, a simple bass line, and a kick drum track with
> > the kick drum pounding on the down beat.
> > I waned to use the steady One Two Three Four of the kick drum as the
> > side chain, applying compression to the bass track.
> > I loaded the two tracks into Ardour, and used Jack Rack to host the
> > plugin. SC3 has three inputs. Two of these, I assume,
> > are for the left and right channels and the third, I believe is for
> > the side chain. Conveniently, all three of these inputs appear
> > in Patchage, so I was able to experiment pluging the drum track and
> > bass track into different inputs. However I couldn't detect any
> > noticeable difference
> > in the sound of the bass track no matter what arrangement I used.
> >
> > I was wondering if anyone had experience with these plugins, or knew
> > of a better (JACK friendly !!!!! ) way to do side chain compression
> I believe someone did this in a hackish manner entirely in ardour, you
> should be able to find that in the ardour forums. I believe I have read
> that it should be possible with jackrack without that hackish stuff but
> I've never tried it.
> Best regards,
>        Philipp
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