A sidechain compression configuration can be useful to create a ducking or "pumping" effect on particular audio source. The effect is usually triggered by a transient-heavy track (eg. a kick track). This article will explains how to create such an effect in Ableton Live using the Native Instruments VC 76 compressor on a synth pad.
- In Ableton Live, create two audio tracks. The first track contains a Kick track playing each quarter note of a bar. The second track contains a sustained Pad sound. Both tracks in Live are named accordingly.
- On the Pad track, load the VC 76 as an effect plug-in.
- Activate the the Sidechain button on the plug-in interface.
- In the Kick track turn Send A all the way up to its maximum value.
- In the corresponding A Return track set the Output Type to Pad and the Output Channel to 3/4-VC 76.
- Press play. You now hear the Pad's volume being attenuated by the Kick track. Tweak the settings on the VC 76 to create a strong or subtle ducking effect.