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A possible tool is eightbitjim/cassette-nibbler: Data recovery from 8-bit computer cassette tapes (Commodore 64, Vic 20, ZX Spectrum, etc). I'm not sure how well it reads nonstandard loaders, but in listing mode (-destination=listing) it gave me this for the GORR34 tape converted to wav: java -jar ../cassette-nibbler-0.1.jar -destination=listing ../...


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Just my 2 cents on this. The Spectrum tapes you are looking at use Frequency Modulation (FM) instead of Amplitude Modulation (AM). This makes them incredibly resilient to amplitude noise, such as you are showing a lot of. So, the actual data values are not encoded by the amplitude of the signal, rather the frequency of it. I assume that you'd need a ...


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