It would be nice to play .dff files correctly in Foobar, but meanwhile Audirvana does it for me, and there are also programs that can convert .dff to .dsf (like Tascam Hi Res editor, and Deffy).
Since my new solution plays my DSD files suprisingly well, I am testing the Tascam DA3000 recorder again. However, something has happened, maybe after I installed windows 11 on my pc, Windows now does not recognize micro cards formatted on the Tascam, and vice versa.So my recording of some good LPs like Jeff Beck: Performing this week, and Pharoah Sanders: Promises, was a waste of time. The files are seen by Tascam ok and can be played back there, but not by Windows. "Do it again, Sam".