Focusrite Saf?re PRO 14 User Manual page 28

S/PDIF Output Mix (unit 1)
Click on the second mixer tab.
Ensure that the mixer output is stereo by clicking on the stereo button (below the meters of the output channel).
The input configuration will be the same as in the first mixer, set the levels and panning as required.
The S/PDIF input to the mixer should be MUTED (this prevents feedback).
Rename the mix to "S/PDIF Mix" (or similar) by clicking on the name field (below the meters of the output channel).
The S/PDIF output Mix will just be a mix of the audio inputs on unit 1. The S/PDIF input will be muted to avoid feedback, and the mix
will be sent out of the S/PDIF output to unit 2. The configuration is as follows:
Unit 1 Analogue Ins SPDIF to UNIT2 Selected SPDIF from Unit 2 muted Master fader Set to 0
SPDIF Mix to Unit 2 sent via SPDIF
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