Avoiding echoes with a 'mix-minus'

As the name implies, a 'mix-minus' is a full mix of the various audio sources being recorded or broadcast, but with your - or a guest's - microphone excluded.

They are used to prevent echoes or feedback from being heard as someone is speaking.

For example, if someone records a voice track or takes part in a live phone-in without using a mix-minus, they may hear their own voice back with a slight delay, which can be distracting.

Some audio interfaces—like mixing desks or external sound cards—have built-in mix-minus options that can be used. This is sometimes referred to as a 'clean feed'.

Check your audio device's documentation for help setting up and using a mix-minus.