Talcum powder frass

Any help on this one?
Yellowish talcum powder frass found in small clusters which seem to be dropping from band joists. It looks more like scrapings from sanding wood.
Maybe some type of bugs?
Thank you :neutral:

See any small round holes?

Sounds like powder post.

Ditto what Roy said

Carpenter ant frass?…any black specks in it?

What Roy and Glenn said. Scroll down a few pictures: