Checking mp3 for upconvert and is such a spectrum of frequencies possible (Screenshot)?

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Testosteroz2017-03-03 20:38:15

Audio

Testosteroz, 2017-03-03 20:38:15

As far as I know, the peak frequency for mp3 is 21000 Hz, correct me if I'm wrong.
And what is the minimum frequency for 320 kbps? (To distinguish 320 from 256, etc.)

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Eugene Y, 2017-03-03
@1eqinfinity

Tau Analyzer. There is even an article on Giktimes . True, you first have to convert to wav.