Hi 0crr,
iTunes has a 70% (and growing) market share and has been making a profit for some time now. All other music services use an incompatible file format and are losing large amounts of money because they lack economy of scale. If you want to buy music, it would be prudent to pick a file format that won't become obsolete when your music supplier folds.
All music players (except some Sony units) will support MP3 file format as a lowest common denominator--but MP3 won't sound as good as AAC or WMA. The AAC file format used in iTunes complies with open standards set by the MPEG4 trade organization. The WMA file format used by Napster and others does not comply with MPEG4 standards, and is a proprietary format being pushed by Microsoft.
Besides the way the music is stored (MPEG4-compliant or proprietary file structure), there are also differences in the way that musician's intellectual property rights are being protected. In general, iTunes gives you more flexibility in terms of you can enjoy your music--how many computers you can store your music on, how many music players, how many playlists you can make, whether the copies are high quality AAC files (as opposed to lower quality MP3), etc. But because iTunes is the only software supporting that Digital Rights Management (DRM) approach, it is sometimes called "proprietary" while the various flavors or Microsoft DRM are called "open".
There is third-party software that will convert between WMA, AAC and MP3 file formats. It works, but the results won't sound as good as if you had downloaded the music or made the file straight from a CD.
Brad
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by: chiingliangPosted on 2005-08-13 at 22:17:52ID: 14669375
stick to wmp if you want to use sync function to your pocket pc.
itune is great if u have a ipod.