I need an add-on S/PDIF optical output port for an Asus motherboard (A7N8X Deluxe), as given by the item on this page labeled "S/PDIF OUT/COA+OPT Module" -- this particular one has two digital audio ...

My monitor has an HDMI input, from which it then splits the audio signal to a coax SPDIF out port. Is there any cheap hardware to convert this to analog where I can plug in a 1/8" headphone jack? PC ...