In this video, Joshua Casper shows you the power of TrackSpacer and how to use it in Ableton Live.
TrackSpacer has is essentially a 32 band dynamic EQ that is easy to set up and is an absolute workhorse when it comes to carving out sonic space for your mixes. It analyses the spectrum of the sidechain and applies a reversed EQ curve to another track. That way you are creating space for a certain track by cutting the exact frequencies that it needs in realtime to another track.
Watch and be prepared to be amazed.
Check out TrackSpacer by WavesFactory on Plugin Boutique.