iTMS Encoding at 63 Kbps???

Discussion in 'Mac Apps and Mac App Store' started by Diomedes, Jan 3, 2006.

  1. Diomedes macrumors 6502

    Joined:
    Oct 5, 2004
    Location:
    San Francisco
    #1
    I purchased an item from iTMS last week, and was astounded to see it was encoded at 63 Kpbs, by the Nero AAC Encoder! What is this all about??
     

    Attached Files:

  2. iMeowbot macrumors G3

    iMeowbot

    Joined:
    Aug 30, 2003
    #2
    If you check the size of the file and divide by the run time in seconds, do you come up with a different number that seems closer to 128? Sometimes the frames used for displaying bit rates are a little off.

    If the file size really is too small, then I guess CD Baby screwed up when they encoded it.
     
  3. Lacero macrumors 604

    Lacero

    Joined:
    Jan 20, 2005
    #3
    Would it have anything to do with this?

    Nero Integrates MPEG-4-AAC Audio Codec for Superior Audio Compression

     
  4. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #4
    That press release is from 2002. ;)

    The nero AAC encoder is more "advanced" than QT/iTunes in that it supports VBR and ABR modes over a wide range of bitrates Maybe this one was ABR or VBR which threw iTunes off since it doesn't expect it.

    Nero also supports HE-AAC as well as LC-AAC, which could support lower bitrates for similar quality, although those claims have yet to be fully demonstrated.

    EDIT:
    The info was in the attachment 4.8 MB/570s~70kbps. Either the file is ABR/VBR and has lots of silence in it, or CD Baby really screwed up.

    B
     
  5. Diomedes thread starter macrumors 6502

    Joined:
    Oct 5, 2004
    Location:
    San Francisco
    #5
    I reported it to iTMS Support. I've noticed a couple other tracks encoded with Nero at odd bit rates (127, for example).

    I hope this was a mistake, because I love that track :)

    There isn't a lot of silence in it, and since I've never encoded with VBR, I would have no idea of how to tell the difference.
     
  6. balamw Moderator

    balamw

    Staff Member

    Joined:
    Aug 16, 2005
    Location:
    New England
    #6
    Dumb question. Does it really run 9:30? If not, and it actually runs 4:45 it's the time, not the bitrate that is off somehow.

    B
     
  7. Diomedes thread starter macrumors 6502

    Joined:
    Oct 5, 2004
    Location:
    San Francisco
    #7
    No, not a dumb question, since there have been a few tracks from iTMS that don't match their advertised running times (or vice-versa — once downloaded, they are actually longer than advertised on iTMS).

    This one, however, is it's actuall length. I went and downloaded the rest of the EP, and all are encoded the same.

    However, I have to say...it was only when I actually SAW the bit rate on my iTunes library listing that I noticed it. The sound was degraded, but initially I attributed that to the source recording. Subsequent listenings revealed the sound quality. I remedied it by increasing the volume in the track's properties and trying different equalizer settings. (Equalizer settings don't transfer to the iPod, do they?)
     

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