This issue has just surfaced after weeks of trouble-free use - after applying the build 247 update.
All 24bit files are being truncated to 16bit - whether local or TIDAL.
Roon Server (247) running on ROCK
Roon (247) running on MacBook Air (Sierra 10.12.6)
B&W MM-1 speakers attached via USB to the MacBook.
Please let me know what further info you need to investigate futher.
Can you please open Device Settings of the MM-1, take a pic of General and Playback tabs and share them with us ?
We think that the behaviour you are seeing after an update is correct. First, MM-1 only supports 16/48 over USB. Surprisingly, manufacturer avoids mentioning supported sample rates anywhere on their website, but we’ve seen a lot of scattered reports about that in the internet ( here is an example https://www.innerfidelity.com/content/bowers-wilkins-mm-1-desktop-computer-speakers ). Second, before this build there was a bug in our CoreAudio implementation which was falsely reporting incorrect bit depth.
Okay, thanks Vova - good to know.
As the MM-1s are my speakers of choice when working I’ll look into by-passing their built-in DAC.