https://support1.bluesound.com/hc/en-us/community/posts/4406362800151-Audio-Clock-Trim
So there is no confusion about the clock trim function, below is a post from TonyW of Bluesound…
”The Audio Clock Trim switch was added to adjust an issue with some specific chipsets of external DACs. If you are hearing noise, dropouts or jitter, please disable Auto Clock Trim.”