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I am a long time listener, first time caller on this listserv. I am student looking for some help on research I am doing on the standard audio compact cassette. Specifically, I am looking for any information on the upper frequency limits a compact cassette could capture but in general I also wonder if there are some resources people may know of that explain some of the essential, but more technical, characteristics of cassettes and cassette recorders (e.g. alignment, tape bias, equalization, gap loss.) I seem to be at an intermediate stage where most of the resources I find are too general and don’t give me any new information, or so technical that I have difficulty making sense out of them. I would really appreciate it if anyone could give me information about what factors limit the ability of cassette tape/recorders to record high frequencies, and some idea of what that limit might be for standard commercial equipment and tape? And/Or more generally point me to any resources that might help me understand some of the more technical aspects of cassette recording and tape characteristics. And while I am at it I may as well solicit your opinions on digitizing cassettes. I have read several case studies of institutions digitizing their own cassettes, but then I have also read the IASA TC reports, Sound Direction, ARSC TC guidelines, etc. and these reports would indicate that digital transfers should always be done by audio professionals. What do the folks here think? Is there some middle ground? On a format as ubiquitous as the compact cassette is it conceivable that an institution could responsibly do its own digitization work? Just trying to sort it all out. Any help is greatly and kindly appreciated. Best, Derek Jackson