It's a year late but yes, that drop-off is just over 20kHz. I can see how it'd look like 11 but this is a logarithmic scale. Everytime there's a wide gap the number doubles - in this case from 10 to 20kHz.

Hmmmm, as I said I *am* pretty audiophilic. What I'd like to know is if anyone knows of any research into what differences higher quality sound make to the average person's enjoyment of music that they may not even be aware of.

Often after spraying a non-audiophile friend with an unchecked little blast of audio nerdery they'll say something like 'Lossless, 320, 128,... Honestly it doesn't matter to me, I can't tell the difference.' I then insist that whether they're conscious of it or not it does make a difference to...