Yamaha CD Recordable/Rewritable Drive CRW-F1 Owner's Manual page 30

Preparing the CRW-F1 Drive
Digital connection
Digital connection enables you to enjoy higher quality audio with less
distortion since the digital signals recorded on the audio CD are output to the
sound card with high fidelity.
Connect the digital audio output jack of the CRW-F1 drive and the S/PDIF
(digital audio) input jack of the sound card with a digital audio cable. Be sure
that the connector is in the correct direction prior to connecting it.
Digital audio output
jack
Ground (G)
Signal (D)
Note
A digital audio cable with a proper connector and a sound card with an S/PDIF
(digital audio) input jack are required.
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Digital audio cable
Sound card
S/PDIF
input jack