I have this titanic task to do: I would like to run evaluation through all of my files and see, what is the real quality of them
I know there is BITRATE tag field in Mp3tag available under information fields sub-menu, but this gives only the supposed quality. [There also is the CODEC tag field, but that gives only info about codec used for creation of the file]. And it is useless for me because all of my MP3's at some point had same makeover done on them [after which they were encoded into 320 MP3]
But recently I got acquainted with the function of spectrogram in Audacity: by using it I can see if for example a FLAC file really have all those sounds not present MP3 files or if someone only encoded sound of lesser quality into a higher quality format. Unfortunately, right now I do this by hand, one file at a time; and it takes a lot of clicking every single time; and on top of that I also don't know how to export info about the real quality into a tag field
And as the difference between maxed out 320 MP3 and a FLAC is undetectable for me, a difference between 192-256 and 320 MP3 is. So If would want to replace the lesser ones with something better [320 or FLAC]; but in order to do that effectively / systematically, I would first need to single them out [and create some kind of a work schedule]
So the question is: what can I use [to do this in a kind of an automatic way]?
I've already googled this topic to some extent, coming out with the aforementioned Audicity software [and some other pieces of software which didn't stay too long in my system]. Maybe someone here already did the same thing with his / hers files? Or know what could I try out?