Atlona's AT-AD2 Toslink/Coaxial Audio converter is a great little gadget for those who need to convert optical to coaxial or coaxial to optical or even input a single optical or coaxial and get both outputs working simultaneously
The Atlona HDMI Multichannel to 2Ch Converter provides a solution for multiple audio formats. The AT-HD-M2C transmits its own multichannel EDID in place of any connected display?s EDID, to ensure when there are multiple displays the connected source
The Atlona AT-HDR-M2C-QUAD is an audio converter for extracting and downmixing multi-channel PCM, Dolby, and DTS audio from HDMI. The HDR-M2C-QUAD provides simultaneous audio conversion for four HDMI sources.