[Avatar86]

Hi Guys!
Hope your having a good day/ evening.

I've come over some different 96 kHz 24 Bit FLAC files and to check the audio quality I threw them in to Adobe Audition to look at the Frequencies on the Spectrogram.

Two of the files looked flawless but the other three were questionable..

- What is happening here?

Picture 1: Avengers - Endgame Outro. Looks flawless.

Picture 2: Björk - Hidden Place. Looks good apart from some lines and som darker fields, these might be sound that synthesizers make maybe?

Picture 3: Roy Orbison - Oh, Pretty Woman. OK, Now here the peaks doesn't go as high as the first two audio files (why?) and there is a Purple fog over the whole thing (why?)

Picture 4: Dream Theater - Untethered Angel. Looks kind of fine but there is a line cutting through the whole song at 37 khz and the peaks doesn't go al the way up (why?), and the waveform looks over compressed (but that might be true to the original mix).

Picture 5:Traffic - Glad. now this Must be an up sampled 320 kbps MP3!?

What do you guys think? is there any other way of telling an Original Master rip from a homemade vinyl recording @ 96/24?
thanks

 

[Roseval]

If this is the original 1964 recording of Oh, Pretty Woman, the spectrogram looks fine to me.
Recording gear at that time was probably struggling to capture anything above approximately 16 kHz
The "fog" might be tape hiss.

 

[gerelmx1986]

I have a similar with the latest Naive Vivaldi edition Album. Concerti per violino VIII "Il teatro", bought it from qobuz as 24/88,2 FLAC. the songs cut at about 40kHz and no more. Maybe the mics, or the final mix, with all this crap of lossy MQA who knows

 

[Avatar86]

I have a similar with the latest Naive Vivaldi edition Album. Concerti per violino VIII "Il teatro", bought it from qobuz as 24/88,2 FLAC. the songs cut at about 40kHz and no more. Maybe the mics, or the final mix, with all this crap of lossy MQA who knows

Oh yeah, doesn't this have to do with the Nyquist theory that the wave needs double the frequency span to cover both + and - pole, (Worthlessly explained).
So a 44.1 kHz track will show 22.05 kHz on the one channel cause the other 22.05 kHz goes the same but to the negative.
(Somebody please explain it better ^_^)

 

[Roseval]

Shannon-Nyquist says the highest possible frequency should be below 1/2 of the sample rate.

 

[Avatar86]

Still... (in the pictures) does any one know why there are "Lines" going straight through some of the track?
And at picture 5, is this track really 96/24?

 

[gerelmx1986]

Still... (in the pictures) does any one know why there are "Lines" going straight through some of the track?
And at picture 5, is this track really 96/24?

I asked the same question a time.a.go they are result of some RF noise captured during recording