ipod format questions...

in iPod + iTunes + AppleTV edited January 2014
Just a few questions dealing with the file formats on the ipod...

Is AAC a lossy compression format or lossless?

One thing I've noticed is that even though every single song on my ipod is ripped directly from a CD, some tracks don't sound as well. On my ibook the tracks sound fine, but I think my roommate has moved a few tracks around, would this cause the tracks to resave and therefore cause file degradation since MP3s are a lossy compression?


  • Reply 1 of 3
    eugeneeugene Posts: 8,254member
    AAC uses lossy compression.

    File degradation via copying files?
  • Reply 2 of 3
    liquidrliquidr Posts: 884member
    Originally posted by Eugene


    File degradation via copying files?

    No sir, it is sir or mam, bleagh, sleep dep. Okay, no what I was thinking was resaving a file after opening, such as JPEG file degradation after multiple openings and savings of the same file (not copying). Is this the same sort of operation the ipod update goes through? If not, why is these specific tracks sound funny on my ipod, but sound okay on my ibook while the other tracks sound fine on both? Just some weird anomaly?
  • Reply 3 of 3
    eugeneeugene Posts: 8,254member
    iTunes copies files to the iPod, it doesn't reencode them or augment them in anyway. I've actually found iTunes to have flatter playback than the iPod or QuickTime Player.
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