3.5mm Aux OUTput to either optical or digital coaxial INput

Hey Everyone--

I can't seem to find a solution at Fry's, Best Buy, or Circuit City--and as yet, neither with Google. I would like to connect a device that outputs stereo audio using a 3.5mm auxillary interface to either an optical or digital coaxial input--with minimal quality loss. Do you know of any cables and-or converters that I may obtain to connect these 2 devices?

Specifically: Xantech Bluetooth Receiver (output device) to Yamaha ATS-1010 sound bar.

Would appreciate the help.

Regards,
Mac