[FFmpeg-user] Compare quality of 2 audio files
rodolfo.medina at gmail.com
Sat Jun 24 14:17:53 EEST 2017
Maik Waschfeld <Maik.Waschfeld at Maik-Waschfeld.de> writes:
>> Am 24.06.2017 um 09:22 schrieb Rodolfo Medina <rodolfo.medina at gmail.com>:
>> In this case, I import file1.mp3, I invert it, then I import file2.mp3: the
>> game does not succeed: what I hear is not the difference between them - as
>> it is when file2.mp3 = file1.mp3 -; what I hear seems rather to be the sum
>> of the two...
> That’s strange!
> As playing two files at the same time, technically is a summing-function, if
> the result is louder than the single pieces, the invert didn’t work.
> Maybe one of the files was already inverted, before you got it.
> Just invert on one of the tracks again.
> Essential to the process is too, that both tracks sync exactly.
> So when you manually sync the beginning, do they still sync-match at or near
> the end of the file?
> You can and should zoom in on the waveform to do the syncing and checking.
> If they don’t sync-match completely, they are not identical, source-wise.
>> I wish a tool that detect the differences
>> from files with different origines, sources and respective histories... Is
>> that possibile?
> I’m not aware of an application to do this job, automatically.
Yes, the two tracks are perfectly synchronized from beginning to end, the first
one is inverted and second isn't. Playing them together is louder than each of
them as `Solo'. Same piece, same execution, same recording... Only, one was
fetched from Youtube and the other was extracted from audio CD...
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