Could someone please explain just where all the voodoo science is in the following statement (taken from the article in question):
> As a CD plays, the two channels of audio data (not including overhead) > are pulled off the disc at a rate of just over 1400 kilobits per > second. A typical MP3 plays at less than a tenth that rate, at 128kbps. > To achieve that massive reduction in data, the MP3 coder splits the > continuous musical waveform into discrete time chunks and, using > Transform analysis, examines the spectral content of each chunk. > Assumptions are made by the codec's designers, on the basis of > psychoacoustic theory, about what information can be safely discarded. > Quiet sounds with a similar spectrum to loud sounds in the same time > window are discarded, as are quiet sounds that are immediately followed > or preceded by loud sounds. And, as I wrote in the February 2008 "As We > See It," because the music must be broken into chunks for the codec to > do its work, transient information can get smeared across chunk > boundaries. Seems to all be based on good sound reasoning and hard scientific facts not voodoo or magic. The only issue is whether or not one believes that these changes to the musical waveform are audible and if they are indeed audible then under what conditions will they be audible. After that is only a matter of determining whether or not those conditions where the changes to the waveform are audible are important to one's normal listening situation. -- ralphpnj Lock, Stock and Two Smoking Barrels -> Snatch -> The Transporter -> Transporter 2 ------------------------------------------------------------------------ ralphpnj's Profile: http://forums.slimdevices.com/member.php?userid=10827 View this thread: http://forums.slimdevices.com/showthread.php?t=44532 _______________________________________________ audiophiles mailing list [email protected] http://lists.slimdevices.com/lists/listinfo/audiophiles
