>Accessing your iTunes library from other computers and iOS devices is the chief benefit of iTunes Match, but it’s not the only benefit. You can use iTunes Match to upgrade the low-bit-rate tracks in your library to 256kbps AAC files.
Great how-to article from [CNet](http://howto.cnet.com/8301-11310_39-57326759-285/how-to-use-itunes-match-to-upgrade-audio-quality/).
iTunes Match is a great innovation.
Thank you for sharing the info. I really need this since I am planning to buy iTunes.