This is really the wrong venue to ask this question, so I will ask it with glee. Is there a cassette deck that is especially good for playing back cassettes recorded on a variety of different machines over the years—perhaps one with various fine tweaks which would accommodate anomalies of other machines?
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@ReticentTurnip
I am not sure, but your question reminds me of the days of the ZX spectrum* and loading progrrams from tape and stories of people having to adjust the tape head to get the tape to load properly as recording on one computer on to tape didn't mean it would just work on another spectrum and tape deck.
* ZX spectrum and other computers at the time that used cassette tapes to store / retrieve data
