Okay .. I'm stumped.
I transferred three SBD DATs for someone on TS over the weekend. Tascam DA-20MKII > M-Audio Pre > Dell Latitude D800 > Sound Forge.
First two DATs transferred fine. Listened in M-Audio Pre headphones a few times to make sure everything was okay. Saved the files as WAV in Sound Forge, and loaded the third DAT. Again listened to the headphones a few times, everything was fine. Saved the file as WAV, but it saved at about half the file size of the first two, even though all three DATs were two-hours plus. All three recordings are 44Hz 16-bit.
The third WAV file plays back at double speed. The first 30 seconds are normal speed, and then it goes into chipmunk mode. The rest of the recording is double speed.
Any ideas (remember that I listened to all three DATs as they played, so this is not a DAT transport error).