Hi I am using FW2.07Beta and I am quite new to DAP's, spent lots of time listening to music on my iphone through an ok pair of Sony £30 ear buds. After a splurg of cash on an X5, an E12 and a pair of Beyer T51P's I have been listening to some higher quality tracks. Some tracks really show what you have been missing out on since music files got squashed. Now I can't come up with some of the really eloquent descriptions some of you audiophiles produce, don't think my ears are that good. I have listened to one HD track that I downloaded recently that I have been listening to in squashed format for a few years. It's a track by Ryuichi Sakamoto, Merry Christmas Mr Lawrence, played on the X5 through the E12 and with the Beyers it's just stunning. The track starts of with series of notes played on a piano, the melody is gorgeous anyway but you can hear the thud of the wood keys on the felt as well as the pure notes from the piano strings. Perhaps the music is just so clear and intense you imagine the physical action of the piano creating the notes. Listen to it and enjoy.