Those were the free ones i know...

Here's some more expensive ones:

dB-D dynamics processor

Type:

Compressor, limiter, expander, gate and brickwall limiter with true sidechains

dB-D is a pro quality general purpose dynamics plugin. The intuitive realtime interface shows you exactly what's going on, and with advanced features like autogain makeup, variable soft knee, and accurate metering with peak hold, it offers you superb control over the sound.

The unique side chain feature (which requires a multi track application like Cubase or Cakewalk) lets you perform tricks like ducking and synchronized gating, normally only possible with external hardware.

The no-distortion brickwall limiter in the output stage means you can experiment with ANY settings (even huge gain values and long attack times) without fear of blasting your speakers!

With a pro quality algorithm using full 64 bit internal processing, this is the only compressor you will need!

Demo download (pack containing other plugs as well):

http://www.shareit.com/demoreg.html?...p;languageid=1

How to make it work:

Side-chains for ducking
Say you have a bassline on channel 1, and the kick on channel 3:

Open a first dB-D insert effect on channel 3

Set the Send button to A

Open a second dB-D insert effect on channels 1

Setup as a 3:1 ratio compressor, threshold -30dB, gain 0dB ; experiment here

Set the Recv button to A

and that's it! Channel 3 (kickdrum) is now controlling the dB-D on channels 1 (bassline)

easy, innit?


Waves also has a sidechain-comp on offer:

C1

The ultimate dynamic equalizer, and father of the C4. Select any frequency range, then compress, expand, limit, or gate those frequencies. Simply an astonishing dynamic EQ, with phase compensation for transparency and quality. The C1 is a frequency-selective dynamic processor allowing two simultaneous dynamic processes. It is an expert tool for any application requiring compression, expansion or gating. Select any frequency range, then apply a dynamic process to that range, or use as a traditional wideband device. C1 offers mono and stereo capabilities of the compressor and/or the gate.


http://www.waves.com