To receive audio from another external device with S/PDIF output This will ensure the external device receives digital clock from the Focusrite interface reducing the chance of experiencing clicks, pops or interrupts in the audio. Often S/PDIF devices will default to 48kHz (an example of this is the Kemper Profiling Guitar Amp). You should also make sure the sample rate for both the Focusrite interface and the external device are the same. You should set the 'Sync Source' to 'Internal' in Mix Control or Focusrite Control and refer to the user guide of the external device to set its sync source to external S/PDIF. If you use an interface that uses Focusrite Control, you can decide which audio you wish to send to the S/PDIF output in the highlighted area. If you use an interface that uses Mix Control, you can decide which audio you wish to send to the S/PDIF output in the highlighted area. Make sure that if the S/PDIF input is connected to the same external device it is muted to prevent unwanted feedback. To do this, select the desired S/PDIF output (pictured below) and choose what you wish to route to this output using the drop-down menu. You should then launch Saffire or Scarlett MixControl (for Saffire and 1st generation Scarlett interfaces), or Focusrite Control (for 2nd gen+ Scarlett and Clarett interfaces) in order to route audio to the S/PDIF outputs. If you are sending audio from your interface to another device you should first connect the S/PDIF output of the interface to the S/PDIF input of the external device using a coaxial S/PDIF cable - such as a CD recorder. This can be used to connect a device with digital output or input to avoid unnecessary conversion from analogue to digital and vice versa.
The S/PDIF RCA connection on the back of your Focusrite interface is a digital connection that allows two channels of S/PDIF Format Uncompressed Digital Audio to be passed along a single unbalanced coaxial connection.
Applies to: All interfaces with S/PDIF RCA on the rear panel
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