[FFmpeg-user] Compare quality of 2 audio files

[Rodolfo Medina]

With Maik's kind help, I managed to sync the two files I wanted to compare:
within Audacity I had to shift one of the two exactly 34ms to the right.  Then,
after inverting it, by playing them together their difference can be heard.
Now, supposed one doesn't know, how is it possibile to tell which one of the
two is best quality and which one is the worst?

Thanks,

Rodolfo