groepaz wrote:... badly aligned c2ns are much more of a problem than signal degrading over time.
The nice thing with a datasette protocol which takes into account the effect of the playback filter of the datasette is that even with a poorly aligned R/W head, it will load just fine.
That's because the amplitude of the signal at the input of the Schmitt trigger remains strong.
I hope I know, I tried a bunch of different frequencies in order to get a good idea of the
transfer function of that filter.
The sad thing about not taking this filter into account is if you play back a tape with an accelerated protocol that won't load anymore on a standard audio tape deck, everything looks fine on a scope. That's because a standard tape deck doesn't have that filter...
You know what I do when people start arguing with me about this sort of stuff that's so basic ? I bring out the scope and I prove my point...
The truth is you have strictly no idea if a specific tape carrying data saved with a specific protocol results in the Schmitt trigger getting a strong signal that can take a lot of punishment or a near limit signal that's about to become unreadable during loading. You even dismiss that as completely pointless.
Once more you seem to be willing to argue about it with tooth and nails.
Be normal.