Several hundred. I have already transferred almost every single one of them years ago but thought about maybe retransferring some. Just snapped An Eddie Speaghetti tape. Agh! I think my DAT player has finally seen its last days.
Run your DATs into your iRiver (optical input). Do not run your DATs thru the Extigy (automatic resampling), or into your M10 (analog generation). If you DAT Player doesn't have an optical output, borrow a Hosa ODL-276 (I can lend you one) to convert the coax to optical...
If you've broken a tape recently, stop listening to your DATs. At this point, I would only play them once more, when you do the Transfer.
Terry