... just as likedeeler I see it pop the 22KHz treshold quite confidently...¦-)
It may be useful to consider that the sound of a digital audio file exceeding the maximal range of MP3 (< 21 kHz) is neither necessary nor sufficient to conclude that it hasn't been subjected to lossy compression.
Not necessary: master recordings are often faded out frequency-wise at 20 to 21 kHz.
Not sufficient: lossy audio can be treated with exciters or similar devices, which results in the addition of artificially generated overtones. See
this topic, for example, where we had an official download with a sampling frequency of 48 kHz, provided by the label, and it turned out to be fake despite the sound going up to 24 kHz.
The presence of high-frequency noise is thus more reliable as an indicator of the (probable) absence of tampering than the general presence of high-frequency sound. Noise takes more effort to fake than just putting an MP3 file through an exciter.
