Yesterday we walked you through everything you need to know about using iTunes Match. Today, Macworld highlights a super-fast new trick to help you upgrade all your low-resolution music to the services excellent 256 kbps AAC files.Its been known that iTunes Match can upgrade all those gnarly low-quality files in your library to the high-quality ones in Apples cloud, but if youve got a lot of music, it could take forever to slog through your library one by one. So instead, once youve matched all your music, just do this:

via The Fastest Way to Upgrade Cruddy Music Files with iTunes Match.