256Kbps AAC and 320Kbps Vorbis both comfortably exceed the threshold of audibility for 99.999% of people 99.999% of the time. If you somehow cared about the dif

256Kbps AAC and 320Kbps Vorbis both comfortably exceed the threshold of audibility for 99.999% of people 99.999% of the time. If you somehow cared about the difference between either of these (or uncompressed, for that matter) then you're not listening to music properly. The days of 128 Kbps MP3s encoded with L3enc or Xing with horrific pre-ringing and squelched cymbals is long gone.