> On 2019-01-03, at 15:59, Francesco Messineo <francesco.messineo@gmail.com> wrote: > >> Back when Type II was established, the type II tapes had an extra notch >> next to the erase control tab and most recorders had a sensor that >> detected the type that way. Wasn't something like this also added for >> type IV as well? > > yes, every kind of compact cassette had different holes, No. Type III, which was originally a dual-layer medium and later on a different material with characteristics similar to the original dual-layer FeCr, didn't. It was introduced theoretically to allow higher quality recording on recorders not supporting Type II (CrO2) and therefore "presented itself" mechanically the same as Type I (Fe2O3). > but recorders > were not forced to auto-detect, my recorder in the '80s supported type > I and IV but had no autodetect, I needed to "inform" it via a switch > on what kind of cassette I had put in it. > The high end ones I'm sure had autodetect. It wasn't so - autodetect vs. manual selection was about similarly distributed among higher and lower end of machines. I would say even more of autodetect was on the lower-end. I kept buying only the higher end ones and always with manual selection as this was an important factor to me. That's because I wanted to use 70us all the time and also because I moved some tapes around between the cases (f.e. due to mechanical shell damage) and that would fail to work if the new shell was not of the same type. Yes, later some of the high-end machines didn't have manual selectors but I never bought one that didn't at least allow me to adjust bias and EQ. -- SD! - https://e4aws.silverdr.com/Received on 2019-01-04 11:01:04
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