"frequency analysis isn't really indicative of anything related to lossy data compression. "
Just the opposite, that's exactly what it's doing, a frequency analysis does show you where and how much sound is missing data created by compression. It's a perfect way to test and read what's lossy or not.
Quote:
Originally Posted by jameskg
frequency analysis isn't really indicative of anything related to lossy data compression.
Room acoustics, mics, recording system (or transmission system, if recording a broadcast" can all show HF roll off. It is not, by itself, indicative of lossy data compression.
There are MP3 encoder settings that don't roll off much, if at all. Still chunks of data missing.
A good spectrum analyzer is the only good way to be sure if something has been run through lossy data compression, like MP3, ATRAC, etc.
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