tnx 4 the link it was very useful if you bump into stuff like that please share them
You're referring to that 24/192 article, right? I especially enjoyed the "spectrophiles" analogy -- its funny because its so true. Many people are not aware of how easily their ears can decieve them. Its very easy to hear differences and sound quality improvements in places where none exists in reality... High-resolution audio is an example of those situations. If you're interested in this topic, here's one lesson I found quite entertaining:
http://www.youtube.com/watch?v=BYTlN6wjcvQ