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I'm not sure how old Stanley Alten's textbook is, but the frequency response limits for vinyl haven't been at those levels since the 1950s. Most people didn't have speakers capable of reproducing sounds beyond those levels so there was no need to put full frequency recordings on vinyl. Vinyl as a medium has a higher potential limit for high frequency reproduction than CD because there's no built in brick wall frequency response limit for vinyl. Whatever frequencies are put on vinyl can be played back. Put on a copy of the Cardas Frequency Sweep LP and look for Track 2a which goes from 30Hz to 30kHz. People won't be able to hear the limits of the frequency sweep, but a turntable can reproduce the sounds.
Audio, ergo sum.
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