Optimal codecs / settings for quality

[Gendji]

I do not understand them either. If i look at my own music files, there is much more definition (for lack of a better word) between peaks, not blocks as shown in the pictures. That looks kinda weird to me.

I mainly use spectrograms to (try ) to determine if, for example a flac file, is a converted mp3 instead of a real one. Not an exact science i know, but i noticed weird things a couple of times with flac's i bought.

[Zak]

Is it me or do the spectrograms linked in the first post Opus Spectrograms in comparison look weird?

I also don't really understand those spectrograms.
They are not explained very well, e.g. not specifying bitrates per spectogram.
I get the impression that he 'Frankensteined' some of these spectograms, in an attempt to show different bitrates in a single spectogram?

The caption is Spectrogram of a Opus-encoded music recording at different average bitrates (~32 to ~160 kbit/s), so each section separated by the green dots is probably a separate file. I'm not sure you could ever get a single file to generate a spectogram that looked like that.

[Gendji]

Ah yes that makes much more sense :-), thank you.