Good answers above.

Also consider using a demagnetizer tape before starting the process. You might also have a wand that does the same thing, although you have to know how to use that or you can make things worse (and maybe erase the tape).

I have recovered many old cassettes. I use Adobe Audition, which is particularly known for its noise removal capability. It samples a bit of the tape noise and then subtracts that from the recording. It normally does not remove highs.

In addition to the tape being recorded with Dolby (and there's both Dolby B and the less common Dobly C), there is an outside chance your cassette could have used DBX noise reduction. Whatever it is, you really need a tape deck that supports it in order to decode it correctly.


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