Ed,
Gordon Rankin has found that the CPU speed affects the playback of Apple Lossless even though the CPU shows minimal use during play. My iMac 2.8GHz Core 2 Duo sounds the same with AIFF and Apple Lossless. My Mac Book Pro 2.01 GHz Core 2 Duo sounds better with AIFF. You can use the convert feature in iTunes to convert files to AIFF and it will leave your Apple Lossless files. Try it and see how it sounds on your MacMini.
Steve
Gordon Rankin has found that the CPU speed affects the playback of Apple Lossless even though the CPU shows minimal use during play. My iMac 2.8GHz Core 2 Duo sounds the same with AIFF and Apple Lossless. My Mac Book Pro 2.01 GHz Core 2 Duo sounds better with AIFF. You can use the convert feature in iTunes to convert files to AIFF and it will leave your Apple Lossless files. Try it and see how it sounds on your MacMini.
Steve