320-->256 = Lossy?

Discussion in 'iPod' started by johnjeffrey, Oct 7, 2006.

  1. johnjeffrey macrumors member

    May 17, 2006
    Hey there if I convert my 320 aac files into 256 aac files, will there be loss of quality involved, aside that from the obvious?

    I know that when you encode say 256 into 320, it does not actually increase the quality of the music--just wondering about the opposite.
  2. Blue Velvet Moderator emeritus

    Jul 4, 2004
    Yes, there will be some quality loss but whether or not it's noticeable is debatable; this particularly depends on your playback equipment.

    If you're looking for huge space-savings you may be disappointed unless you have many 10's of gigabytes of music
  3. spicyapple macrumors 68000


    Jul 20, 2006
    I'd go out on a limb and say you won't notice a big decrease in quality, since you're downsampling, but why go from 320 to 256? It makes more sense to keep your original at 320 and create a 128 for space savings, with only a slight decrease in quality.
  4. johnjeffrey thread starter macrumors member

    May 17, 2006
    Interesting idea spicyapple..so your saying that if i convert my 320 files to 128's that there would be no difference than if I converted a lossless file to 128?

    for example, if i rerip a cd at 128aac it would be the same quality as if i just convert my 320aac album to a 128aac?

    also good idea about keeping the 320's on an external or something as a backup for when they do come out with an even-larger capacity ipod and using the 128's for now.
  5. Hoef macrumors 6502a


    Jul 11, 2004
    Houston, TX..... (keep walking)
    how about 320 aac back to compact disc (compared to the orginal CD ....) probably some quality loss, but not much (I hope). Any thoughts?
  6. johnjeffrey thread starter macrumors member

    May 17, 2006
    Wait so 'downgrading' from 320 to 128 is not a terrible idea? Would the 128aac tracks come out the same as if they were imported straight from itunes originally?

    i only ask because i know encoding from 128-->320 would be a disaster
  7. Bill Gates macrumors 68020

    Bill Gates

    Jun 21, 2006
    320kbit/sec is lossy enough to begin with. Why decrease it further?
  8. johnjeffrey thread starter macrumors member

    May 17, 2006
    okay but compression-whining aside--what's the answer?

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