Thanks for the tip. I gave that a try (including Auto-Define before saving), but when I did, CDSD saved it, but the file name did not appear in the header of the CDSD screen (giving me the impression that it did not save properly). I went to the folder where it was supposed to be stored, and there it was! Just for grins, I saved a copy to the desktop, and it saved both the original and the filtered version (after I applied filters). Those appeared to save properly, but I still never got the file name to appear in the header until I closed the file and re-opened it. All this being said, I am not sure that it still is working as it should. I plan to try another double album, but haven't done so yet for fear of investing all that time for nothing.
The "Recording time left on disk is 24 hrs 44 min," so that should not be an issue. When I go to save the file, I get a choice of Data Formats: Linear PCM, 8 bit big-endian signed integer, as well as 16 bit, 24 bit, and 32 bit. The default is 8. Do I need to change that to another format?
Since I am asking questions, is there anything I can do to get CDSD to export track numbers to iTunes? Currently, I have to re-type that information into iTunes once all the files have imported. By the way, it was nice to see that the "double export" issue has been resolved. When I export tracks to iTunes, I now only get one copy of each track.