Media - Problem with Foobar200 serving ChromeCast Audio as renderer - WAV conversion?


I have a Foobar2000 dlna server and a Chomecast Audio as the output device.

In Media I can play any source that does not come from Foobar2000 with audible results. When I try to play from Foobar, it appears to be trying to convert an MP3 to WAV - at least that is what the scrolling marquee at bottom left implies…
it looks like this -


I can play from foobar to the web browser option or to a gmrender option, just not to the chromecast option.

Can anyone give me a clue, or have I put this in the wrong category?