> I guess, you could use a 16c73 or
> sim to digitise them. BUT magnetic
> tapes have to be frequency
> compensated before palyback, I seem
> to recall from long ago. If wire
> recordings need to be processed
> similarly you'd probably do that
> before the digitising stage to keep
> the processing simple, I guess?

The head will be the most critical piece. It's probably going to have an
unusually large gap. If the gap on the playback head is too small, then it
will be very noisy, among other problems.

The book "magnetic recording" by Finn Jorgenson may help, it's a tab book.

Good luck!