To combine two or more audio signals or MIDI data streams into a single audio signal or data stream. A stereo mix combines two or more audio signals into a left-right pair of audio signals. Mix can also refer to the control on an effects processor that controls the amount of effect versus the amount of unprocessed signal sent to the output of the processor.
MIX
Meaning of MIX in English
Guitar English glossary. Английский словарь гитарных терминов . 2012