Space science.
The cassette tape during dublication runs at 32 times normal speed?
At more than 1.5 meters per second?
On the amazing paper by the developers.
Reference:
Audio Tape Cassettes - Lely, Missriegler - Philips Technical Review - 1970 - No. 3
http://www.extra.research.philips.com/hera/people/aarts/_Philips%20Bound%20Archive/PTechReview/PTechReview-31-1970-077.pdf
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