Owner`s manual

Audio connections – Mia
S/PDIF Digital Inputs and Outputs
Under the analog connectors is a pair of connectors labeled DOUT and DIN.
These connectors are used to transmit digital audio data via an electrical
signal. S/PDIF data can use the full 24-bit sample width used internally on
Mia.
When connecting devices to the S/PDIF jacks on Mia, the use of standard
analog RCA audio cables is not recommended. For reliable S/PDIF
operation, 75ohm coaxial (RG59) video cables are recommended.
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Audio connections – Mia