#PWYM Ducking Audio With Compressors
Hi guys. In the spirit of sharing and learning, I put together a video showing audio ducking using compressors.
Ducking is reducing the volume of one or more audio tracks based on the volume of another. One example would be to reduce the volume of a music track in a commercial while a voice-over is being spoken, then allowing the music to increase after the voice-over completes.
This is also useful in audio mixing. For example, having the bass guitar's volume lowered or ducked whenever the bass drum plays. This can be done manually using the bass guitar's fader or drawing volume reduction automation, however, this may not be practical because it might require lots of volume automation throughout a song depending on how many times the bass drum plays.
One solution would be to use a compressor on the bass guitar track sidechained to the bass drum track. The idea is that the bass guitar audio will be attenuated whenever the bass drum plays. The bass drum controls the compressor on the bass guitar track through the sidechain.
Here's the video I made using both a bass synth and synth pad with compressors sidechained to the bass drum track. Bass synth compressor is on the left and synth pad compressor is on the right. Listen especially to the synth pad. Every time the bass drum plays, the synth pad volume is immediately reduced, then the compressor releases and volume increases until the bass drum plays again and the process repeats.
This is a pretty aggressive use of sidechained compressors sometimes used in dance/techno type music for a "pumping" effect, but it can be used more subtly and in different ways on other types of music.
I'm by no means an expert on this, so if anyone has a question or wants to add to all this, please do!