What is an Aux Track?

An aux track, short for auxiliary track, is a track in a digital audio workstation (DAW) or mixing console used to receive audio signals from other tracks for additional processing or routing. It does not usually contain its own recorded audio but instead processes signals sent from other tracks.

Aux tracks are commonly used for shared effects such as reverb, delay, or compression. For example, multiple vocal or instrument tracks can send part of their signal to a single aux track with a reverb effect, allowing all of them to share the same reverb processing.

Using aux tracks helps improve workflow and efficiency because a single effect instance can process multiple tracks. It also provides flexible control over how much of each track’s signal is sent to the effect, which helps maintain balance and consistency within a mix.