[wwn_se]

A hack is to use a regular chromecast and a hdmi to rca/spdif adapter/splitter. Works pretty well and you can get them pretty cheap (in the ballpark of $20). But it will be more expensive than the chromecast audio unfortunatley

[d1sxeyes]

A lot of those are really iffy in terms of quality - I had one which when run through my HiFi sounded like it was completely unshielded.