My original tape was very (VERY) temperamental so I downloaded a tap that would fit but it failed. Suspecting it was my old tape I tried on a blank tape and that also failed on real hardware. It loaded in Vice absolutely fine.
After listening to the recording on the blank tape I do think that despite having all enhancements etc off it recorded the big loud fuzz sections at a slightly higher pitch.
I therefore think that maybe some PCs still can affect recording but only if the tape has these certain sounds. I'm guessing it was a copy protection to try and fool auto balance on old decks?
Anyway I found a tap file that is the right length (Shorter) that works fine on my blank tape.
My old tape is 100% dead though I think but that's not important.
Am I ok to provide a link to the file on the forums Remzi?