There are 2 very high tone sweeps, which are extremly hard to be encoded correctly.
I am using relatively cheap, big headphones (10€) and a Creative SoundBlaster Live (put high frequencies to max, using Creative Mixer's standard equalizer), WinAmp for playback
All VBR presets (some of them average up to ~268kbps) of my front-end
RazorLame1.1.5 (Lame 3.93.1) produce garbage.
Even the highly acclaimed -r3mix (averaged at about 220kbps), using the last
RazorLame-Pack version from www.r3mix.net (RIP), produced tiny audible errors.
I can clearly pick out artifacts up to 192kbps CBR (Lame 3.93.1)
Transpareny sets in at 224kbps CBR (Lame 3.93.1)
Did all listening-tests blindfolded, of course :-)
Since I definitely do NOT have the Best Heaphones
it's pretty save to say that VBR is still far from perfect.
I go for 224kbps CBR in the future.
PS: Has anybody else tested this Track, maybe with other encoders?
tonynash