Downconverting 320MP3 to 192... MP3 or AAC?

Discussion in 'Digital Audio' started by Rantipole, Jun 16, 2011.

  1. macrumors regular

    Rantipole

    Joined:
    May 24, 2004
    Location:
    Boston
    #1
    If I have a 320 bit rate song encoded in MP3, and want to "downconvert" it to 192 for space or other reasons, would I be best keeping it as MP3, since it is the same format? Or will going to AAC be better, even in that case?

    I know AAC has a reputation for being more "musical" when encoding from an original source. But I'm wondering if, since I would be switching from MP3 to AAC, if the sound gets "confused", and therefore is sticking with MP3 would be better.

    (Yes, I know "double compressing" is not something I generally want to do. Just interested in opinions regarding this fact pattern.)

    Thanks.
     
  2. macrumors 65816

    Jolly Jimmy

    Joined:
    Dec 13, 2007
    #2
    AAC or MP3 won't really matter at all, there's going to be a severe quality hit either way. As for MP3 to AAC "confusion", I don't think that'll be a problem.
     
  3. macrumors 68000

    DustinT

    Joined:
    Feb 26, 2011
    #3
    AAC will have a slightly better sound quality at that bit rate according to the math gurus. But, they will both sound decent so I wouldn't sweat it too much.
     
  4. macrumors 68000

    musio

    Joined:
    Jun 2, 2008
    #4
    never double compress!
     
  5. macrumors 68040

    cluthz

    Joined:
    Jun 15, 2004
    Location:
    Norway
    #5
    This!

    If you compress something already compressed sound quality gets pretty bad!
    Going from 320->192 will most likely sound worse than going from CD->128
     
  6. thread starter macrumors regular

    Rantipole

    Joined:
    May 24, 2004
    Location:
    Boston
    #6
    I know! :eek: I mean generally, I don't. But needed to temporarily. And actually had already done it to AAC. I just was curious if it made a difference. Still have the original file.

    Thanks.
     

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