Originally Posted by Coma
This isn't MP3. 120kbps AAC is approximately equal to 256kbps MP3.
The bitrate is 128kb/s, not 120, correct? Also, the only comparisons done that I've seen (feel free to link me to any that I missed!) correlate the sound quality of a 64kb/s MP3 with a 128kb/s AAC file, which is significantly different from what you suggested. These are the only comparison "studies" mentioned on Wikipedia as well, for whatever it's worth. Furthermore, as the compression rate of music approaches the 320kb/s threshold of what decoders are required to be able to handle, is there really much difference in quality between the two (MP3 and AAC)? It gets to a point where crappy compression algorithms (MP3) don't show their crappiness if they don't have to compress the audio stream as much when encoding, hence I wouldn't think the difference between the better compression algorithm (AAC) and MP3 to be that significant at 320kb/s. I should point out that really high frequences (15.5/15.8 kHz according to Wikipedia) do sound better on newer compression technologies as apparently MP3 does not have proper encoding capabilities in this sound range. In any case, variable bit rate compression sounds better than constant bit rate compression, and lossless audio is better than everything.Edited by stargate125645 - 12/19/08 at 10:46am