Aux Send vs Bus
Definition
An aux send and a bus are two ways of routing signal out of mixing console channels. An aux (auxiliary) send takes a copy of each channel, at an adjustable level, to a separate output. It can be taken pre-fader, independently of the channel fader, which is usual for monitor mixes, or post-fader, following the fader, which is usual for effects sends. A bus is a summing path that combines several channels into a subgroup, an aux output or the main mix. On many digital consoles, aux sends feed buses configured as mix outputs, so the two terms overlap.
In the field
A monitor mix that changes whenever the FOH engineer moves a channel fader is fed from post-fader sends. Switching those sends to pre-fader makes the monitor levels independent of the front-of-house mix.
Related lessons
Sources
- Aux-send (Wikipedia) : départs pré-fader pour les retours, post-fader pour les effets · en.wikipedia.org
- Mixing console (Wikipedia) : bus, sous-groupes et sortie principale · en.wikipedia.org
- Shure, « How to Control Feedback in a Sound System » : retours de scène et risque de larsen, ears plutôt que wedges · shure.com