OK. I'm an idiot.
I've been playing flac music files, from my Kodi box in another room, through the Roku Media Player, but that had decided about a month ago to freeze with "malformed data" errors every few songs now. So I noticed this thread about roksbox on the forum. I added the roksbox cloud channel to my Roku, and hey (!!) it found my Kodi box!. I went through the setup wizard, where it wanted me to setup folders for video, music and photos. I just took the defaults (it actually never showed me any folder names that seemed relevant, so stayed with /root). Then selected music....
....and it sat at "Parsing directory structure" overnight (for more than 10 hours!). Tried to get out of that this morning via the remote's <------- (back) arrow, where it jumped to a screen which helpfully sat showing "working" (nothing moving, just the word sitting there). After about an hour of that, I tried a further back arrow, but nothing happened. The Home button on the remote finally got me out of Roksbox Cloud.
So, the obvious question is: can roksbox stream out from a wireless connected Kodi box (which the roksbox indicates it can see)? Should I have waited for more than 10 hours to "Parse" the directory structure? Am I misunderstanding what the roksbox does altogether? I went to the roksbox's web site, and see that it makes no mention of working with Kodi (it gives info to install a roksbox server on a Linux, Windows, Apple or NAS system). I only want a (working) alternative to the now-uncooperative Roku Media Player, preferably with a better user interface, maybe the roksbox can't do that?
Any advice or clarification (other than "don't be such an idiot!) would be appreciated!