Do I have AIFF, uncompressed AIFF-C, or compressed AIFF-C?

Discussion in 'Digital Audio' started by Doctor Q, Aug 3, 2012.

  1. Doctor Q, Aug 3, 2012
    Last edited: Aug 3, 2012


    Doctor Q

    Staff Member

    Sep 19, 2002
    Q Division, Los Angeles
    I saved an AIFF file out of Audacity and I want to document the file format.

    Audacity calls it AIFF PCM, which should mean it's uncompressed, and gave it extension .aiff. The file command in Terminal calls it "IFF data, AIFF audio". The Finder calls it AIFF-C, not AIFF, but on the disk I see the string AIFF, not AIFC, in the first bytes of the file.

    Here are the first 42 bytes of the file, where single characters represent themselves and two-byte values are hex values (e.g., "14" means 14 hex).
    F O R M 14 R M 8 A I F F C O M M 00 00 00 12 00 01 0a 29 26 00 00 10 40 0e  ac 44 00 00 00 00 00 00 N A M E
    Which file format is it?

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