I use DB Audioware Dynamics Processor

what I do is if i want to sidechain anything with the kick do it as follows.

1) Get a kick, and put a DB Audioware plugin on it, alter the threshold and ratio and make the kick signal be the SEND signal A (by changing the SEND to A)
2) Add A Group channel
3) Get a drumloop or whatever and route that to the group you just created
4) Add the DB Audioware plugin on the group channel and get that to RECEIVE signal A (by changing the Receive to A)
5) Play with the Ratio, Threshold and Gain to get a pumping sound.

Normally I turn the threshold way down (to approx -25 DB) and turn the ratio up to around 16:1 and turn the Gain up to give a nice pumping effect.

This doesnt have to be with a Kick and a Drumloop can be with anything ie a Kick and a Synth

Louk