I upgraded some songs and it went from 128 to 256 kbps.
That does make a difference although I wish they had gone up to at least 320 kbps.
I am not a real audiophile, but I do care about sound.
With good speakers you need around 320 kbps to get real close to a CD quality 44.1 16-bit recording.
You will hear a clear difference on well recorded stuff between 128 and 256 kbps too.
Last time I tested this seriously I needed 320 kbps to really start to struggle to hear a difference
especially transients on things like a grand piano or trails on strings and acoustic recordings.
On pop stuff it's pretty hard to hear it IMHO as much of the contemporary stuff is mixed so flat and often more or less without dynamics and clarity.
Can still sound "great" so I am not dissing popmusic, just that the need for higher bitrates is more apparent
on acoustuc recordings of high quality. Think for example David Sylvian, Secrets of the Beehive, if you get my drift ... ,-)
BTW: What happened to the lossless downloads?
FWIW YMMV
jtm
Sonically most people can't even tell the difference between a 192 kbps AAC track and a 256 kbps AAC track. .