I've been able to test RuneOS + Pi + ODAC using Airplay and it plays 16/44 ALAC files perfectly. This is very nice!
I am unable to test direct playback using RuneUI because the database scan does not pick up my ALAC files that are stored on a Win7 file server. It does pick up some 24/96 FLAC files though and they seem to play perfectly.
As soon as I can get a successful database scan I will post results of direct playback through the ODAC using ALAC 16/44 and also some ALAC and FLAC 24/96 files.
Regards,
tc-fi