How To tell between a 'real' FLAC and a 'fake' FLAC?
May 12, 2020 at 12:10 PM Post #47 of 50
No, I hear 21 KHz if turn volume on max.
I think there are humans who can hear 21 kHz, but there are very, very few of them. If I was in your position, I would suspect that what I'm hearing is a harmonic (a result of non-linear distortion that any tweeter exhibits because nothing is precisely perfect).
 
May 12, 2020 at 1:35 PM Post #48 of 50
May 17, 2020 at 10:01 AM Post #50 of 50
No, I hear 21 KHz if turn volume on max.

Really? There's certainly published science evidencing that high volume single tones above 20kHz are audible to some people but I don't know of any reliable evidence that indicates 21kHz is ever audible within complex/multiple tones (such as music recordings). And btw, you should be extremely careful about trying to find out, the sort of levels you'll need to stand even the remotest chance are probably at or beyond the point at which hearing damage can occur, even quite short durations. If you do actually detect some difference, almost certainly it will be IMD (inter-modulation distortion), as @Alexium stated. In fact, it's difficult to avoid IMD when reproducing high freqs at high levels.

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