David, I can’t solve that one because I haven’t yet worked with the stems feature, but I have a thought that may be related. One time I recorded a BIAB acoustic guitar track and took it into a recording studio to use as a click track for the session. I recorded it from BIAB with a tempo of q=140.

The engineer loaded my audio track and pronounced it was actually running at 139.8 and change.

My point is, if the tempo BIAB gave me in that case was not precise, trying to play it back with another audio file was futile.

Probably unrelated, but this is one of the reasons I want support for non-integer tempos.

You mentioned ticks and adjustment. Do you have a playback setting of plus or minus some ticks not being zero?

Sorry if my thoughts here may be completely off the mark.

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.