Previous 1 2 Next 17 Replies Latest reply: Feb 3, 2010 6:12 PM by pisceanjanelane
pisceanjanelane Level 1 Level 1 (5 points)
hi there,
i've looked through the discussion forums but i can't seem to find the answer to address my specific problem. i'm running the latest version of itunes (9.0.2) and i recently converted my entire music collection to aac files in order to save space. i used the program max to encode these new files. i then created a new itunes library and was trying to add the new aac files to this library except none of them are recognized - they don't play, they don't get added to the library. i've played these files fine on quicktime with no issues whatsoever.
i hope someone will tell me that there's a solution and that i didn't convert 80+gigs of music in vain...ultimate goal is to fit this on my ipod.
thanks in advance

MacBook Pro, Mac OS X (10.4.10)
  • Chris CA Level 9 Level 9 (77,025 points)
    i recently converted my entire music collection to aac files in order to save space.

    Converted from what?
    i used the program max to encode these new files.

    Why didn't you use iTunes?
  • pisceanjanelane Level 1 Level 1 (5 points)
    Most of my collection was in mp3 format. I didn't use iTunes because a) I actually didn't think of it and b) it just seemed easier with Max. I didn't have to worry about the converted files being in the same library, since I wanted to have a new library with just the AAC files. At the same time, I didn't want to replace all the mp3 files since they are more versatile.
  • Chris CA Level 9 Level 9 (77,025 points)
    i recently converted my entire music collection to aac files in order to save space.

    MP3 and AAC at the same bitrate are almost identical in file size (within a few bytes) so converting will simply reduce the quality of the resulting file. 128 kbps files are ~1MB per minute.
    Converting from MP3 to AAC will result in a lower quality AAC unless you convert to a much higher bitrate then you will simply have larger files with no gain (or loss) in quality.

    Sounds like you have something in Max set incorretly.
  • ta Level 4 Level 4 (1,210 points)
    Do the files have an aac or m4a extension? I think only m4a AAC files will play in itunes.
  • ta Level 4 Level 4 (1,210 points)
    Chris is right. You generally never want to convert a lossy format file to any other format, especially another lossy format. You've essentially thrown out data twice.
  • pisceanjanelane Level 1 Level 1 (5 points)
    Yeah, the bitrate was at 64.
  • pisceanjanelane Level 1 Level 1 (5 points)
    Ah well..I should have known better then. But then, in theory, if I converted FLAC files into an AAC file with a 64 bitrate, I'd be preserving some sort of quality. But even then, why isn't it playing/being recognized in my iTunes?
  • Chris CA Level 9 Level 9 (77,025 points)
    64 kbps sounds like a cheap AM radio (to me).
  • Limnos Level 8 Level 8 (40,685 points)
    Try changing the extension to .m4a
  • pisceanjanelane Level 1 Level 1 (5 points)
    Chris CA - Well, I guess cheap AM radio or not, still not playing...

    limnos - I tried that, no go. but thanks for the suggestion
  • ta Level 4 Level 4 (1,210 points)
    If it's not m4a it's not gonna play. (Dot) m4a and (Dot) aac are not the same format. Itunes AAC files are (Dot) m4a.
  • pisceanjanelane Level 1 Level 1 (5 points)
    Well, since I was curious about what you meant by AM quality sound, I went back to MAX and tried encoding in another format, MPEG 4 Low Delay AAC at a bitrate of 64...and yes, it's quite crappy. But the files I encoded were using AAC ADTS, which really doesn't produce as terrible a quality as the one when I used the MPEG 4 Low Delay AAC, and it's an even smaller file size.
    Original MP3 at bitrate of 320 - 8.7 MB
    MPEG 4 Low Delay AAC at 64 - 2.1 MB
    AAC ADTS at 64 - 1.8 MB
    I really don't know much about audio, but the AAC ADTS doesn't sound too bad...
  • pisceanjanelane Level 1 Level 1 (5 points)
    Hrm...well when I encoded with MPEG 4 Low Delay AAC, the file format was m4a, but it still wouldn't play in my itunes.
    I thought that if it played in quicktime, it should play in itunes and both formats can be played in quicktime.
  • Limnos Level 8 Level 8 (40,685 points)
    Max actually has 3 different AAC versions. The first is AAC ADTS which I believe is more of a Windows flavor. Two are listed under "MPEG4 Audio". In my version of Max the second of the two MPEG4 Audio encodes to .MP4 extension. The first of the two (there isn't any difference in the name so it is confusing) opens in the preferences to let you select Apple Lossless or .m4a (iTunes preferred) AAC.

    I got hints from:
    http://forums.sbooth.org/viewtopic.php?f=2&t=611
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