As boxed, the Biostar TF7050 supports multi-channel analog audio, and HDMI audio, which is digital but encrypted. In order to pass-through AC3 streams (for Dolby Digital and DTS), I needed a standard digital audio output.
The motherboard has headers for digital audio input and output, but Biostar doesn’t supply the necessary cable or bracket. Searching the Internets suggests that just about any manufacturer’s bracket will work, though it appears that all the discount sellers are perpetually out of stock, and many sellers are charging upwards of $30.
The Biostar website lists a “MB S/PDIF Cable” for $15. A call to Biostar tech support (626-581-1055) revealed that this is a full bracket, providing both optical and coaxial outputs. The actual cost, including California tax, actually comes to just under $11.
