s users: “Apple Lossless”, which could save all audio data as much as possible. The method is “Edit—Preferred Settings—Advanced--Import”, and choose this format during the “Import and use” step. However, this format might fat the music file five times!! Incredible!
  Although it’s a “Non-destructive” compression, after all it’s compressed. In case if you really feel uncomfortable about the word “compression”, you could completely use “WAV code format”, then you can enjoy absolute original sound. However, I’d like to warm you ahead, even your iPod has 60GB, music file of this format would have 10MB size for one minute, I guess you may not afford it!! Think about it! Lol…..