Out of curiosity I tried to do this using Quiet Modem, and the clocking was so much worse than I could have anticipated. I got a used deck from ebay that was in

Out of curiosity I tried to do this using Quiet Modem, and the clocking was so much worse than I could have anticipated. I got a used deck from ebay that was in reasonably good condition. Listening to a tape on it, it didn't sound too bad, but when I did some analysis on a waveform on a tape, the playback speed was very uneven. Clock recovery is an absolute must with these, and in general I think it's worse than you'd imagine. Maybe if you had completely bulletproof internals could you actually make full use of the bandwidth.