I can tell the differences between 256kbps and 320kbps with Q701s or HD600s XD
I think it's much more dependent on the genre, if the treble is lacking or drowned out by tons of bass then bit rate isn't nearly as important.

Got to say, I've done this. Clubs are about the music too, and if a place has a really bad audio system, its like.... "erm..."
I've passed my PX-100's to people before, and they've gone "Didn't expect the bass to be that good from such a small headphone".
I've even been to gigs, and asked the sound guy to up certain band members/lower bass, etc.

You know you are an audiophile when ...
Warning: Spoiler! (Click to show)
Haha!
When you want nothing more than to go to sleep while wearing headphones but the music does the exact opposite of lulling you to sleep.
Obviously, but the HD800 is widely considered one of the most revealing headphones ever, so...
I can't sleep in headphones, unfortunately. I'll get to sleep just fine, and it really doesn't matter what's playing. The trouble is I can't stay asleep. I'll eventually wake up and feel claustrophobic, like I'm in a casket, since I can't move my head. At this point I can't get back to sleep and have to take the headphones off.
Hopefully a nice pair of IEMs will help out here.

I can't sleep in headphones, unfortunately. I'll get to sleep just fine, and it really doesn't matter what's playing. The trouble is I can't stay asleep. I'll eventually wake up and feel claustrophobic, like I'm in a casket, since I can't move my head. At this point I can't get back to sleep and have to take the headphones off.
Hopefully a nice pair of IEMs will help out here.
i can sleep more easily (though being unable to sleep sideways has bothered me), its just that when i wake up i realize either im sleeping on them or they are 2 feet from the bed on the floor
What about flac and 320kps? Which music genes should I keep flac, which is fine with mp3?
I am interested in your opinions, because I plan to downsize my music library so that it can fit in my phone.
You pet your Burson while waiting for something to load on the internet. Along the grain of course.
when your looking for your headphones but forgot you already had them on.

+1
I was quite surprised when I realized that aac192 was my transparency point. That was back in 2009. Since then the QT implementation of AAC seems to have improved. Granted, I'm using qtaacenc as my encoder backend (which allows VBR encoding, unlike the iTunes frontend), but my transparency point now is somewhere around ~172kbps on average. I've got a few problematic albums or songs (for some reason Quadrophenia seems to be giving the encoder trouble, and when I have the time I'll test with it to see if I'm actually hearing artifacts), but generally even trebly, overly bright recordings (like pretty much all of Yes) come through fine at my settings.
The last time I tested MP3 was the summer before last, and using LAME my transparency point is still V0 (~245kbps, I believe that comes out to), like it was the first time I tested. That's with my own personal killer sample, though, which is a really difficult part of one of my favorite songs. Usually I find V1 and even V2 to be perfectly listenable on most material. I use AAC to encode based solely on these results, since it's clearly a lot more efficient, at least to my hearing.
BTW, this is what that quote in my signature is about. I know what I can't hear, thanks to my testing. It honestly makes audiophile life a hell of a lot easier and more enjoyable when you're not constantly worrying that every little "off" thing you think you hear might be an artifact.
EDIT: For those interested in testing this for themselves, AFAIK the ABX component no longer comes by default with Foobar. You have to fetch it separately on the components page.
http://www.foobar2000.org/components

Wouldn't this also depend largely on the sound device & headphones? I can't see how effective this test would be for someone like me, i.e. having a laptop with Beats Audio (soooo much better than the headphones) and Ultrasone DJ1.
