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Aux & Monitor Mixes | Soundcraft Signature Plus Series

Video Manual Series


Written by Felipe Guerrero

Updated at September 22nd, 2026

Learn how to create and control aux mixes on the Soundcraft Signature Plus Series of mixers. In this video, we’ll explain how the Aux knobs on each input channel allow you to send different amounts of each channel to a separate mix for monitoring, routing, or external processing.

Aux mixes are commonly used to create individual monitor mixes for performers on stage, whether they are listening through a floor monitor or in-ear monitors. They can also be used to send a unique mix to another room, feed a separate speaker zone, or route selected channels to an external effects processor such as a reverb or compressor.

This video also covers the controls available for each Aux mix, including the new Mix to Aux knob, which makes it easy to create an Aux mix based on a copy of the main mix. By the end of the video, you’ll understand how to build aux mixes, adjust them for different applications, and use them as a flexible routing tool in live sound, studio, and installation workflows.

 

Transcript
Hello, my name is Tony Smith and welcome back to the Soundcraft Signature Plus Video Manual Series. In this video, we’re covering auxes. An aux is an additional output that allows you to create a unique mix for. Usually, auxes are used to feed the monitors of our performers and you can tailor the mix to the performer without affecting your main mix. Auxes can also be used to send groups of inputs to external processors or even in podcasting to create a mix-minus.  
Each input channel strip has four green aux knobs to control the amount of input signal to be sent to the aux mix. You can think of these just like faders for your aux mix. The Lexicon FX return can also be fed into the auxes if the performer wants reverb using these knobs. Keep in mind that this is the same FX return as heard in the main mix, so inputs that are sent to the FX processor will still be slightly heard in the aux, even if the aux contribution for that input is all the way down. 
The main aux controls are found in this lighter grey section. Knobs for controlling the signal level and an LED for monitoring. Each aux has a mute, a listen button, and a talkback toggle to route the talkback microphone into the aux. Each aux also has a global pre/post source button. By default, the auxes will pull audio pre-fader, or before the input fader. When this POST button is enabled, the aux will be based on the fader levels of the contributing channels. 
If your aux just needs to be a copy of your mix, we have simplified this with one knob. These mix to aux knobs to the right of the main aux controls can feed a copy of the main mix directly without the need to set up a post-fade mix.
In the next video, we’re going to cover the Lexicon FX processor. Thanks for watching. For more news, product information, and troubleshooting tips, visit our Anytime Help Center at Help.Harmanpro.com

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