Quote Hugh Robjohns:
Yes, if it sends data down the S/PDIF pipe, it will be formated as linearly quantised audio.
Thanks chaps - will give it a whirl and report back. I too have a Tascam DA-20mk2.
The real fun may be DAT tapes that are partly long-play, and partly standard-play. Have a feeling analog may be the way to go for those...