aifccompress(1)                                                aifccompress(1)


NAME
     aifcdecompress - decompress the audio data in an AIFF-C file


SYNOPSIS
     aifcdecompress [-verbose] infile.aifc outfile.aifc


DESCRIPTION
     aifcdecompress is a command-line program which reads an AIFF-C compressed
     digital audio input file, and copies the header information and sample
     data to a AIFF-C uncompressed digital audio output file.


     The output file will contain copies of all the AIFF-C chunks in the
     original input file. The chunks may not appear in exactly the same order
     as in the original file.


     aifcdecompress decodes data which has been compressed using one of the
     algorithms supported by the SGI audio file library:


     G.722    CCITT G.722 ADPCM 4:1 compression recommended for 16-kHz, 16-bit
              mono or stereo data.  The compression algorithm currently cannot
              handle more than two channels.


     mu-law   CCITT G.711 mu-law 2:1 compression recommended for 8-kHz, 16-bit
              (mono or multichannel) data.


     A-law    CCITT G.711 A-law 2:1 compression recommended for 8-kHz, 16-bit
              (mono or multichannel) data.


     Aware MPEG
              MPEG I layer 1 or 2 audio compression implemented by Aware, Inc.
              for 32, 44.1, or 48 kHz mono or stereo 16-bit data.


     Aware MultiRate
              Aware proprietary MultiRate near-lossless or lossless audio
              compression.  for mono or stereo 16-bit data at any rate.


     If the input AIFF-C file parses correctly, and the output file is written
     with no errors, aifcdecompress returns 0. If there is an error,
     aifcdecompress returns 1.


     If invoked with no arguments, aifcdecompress displays help.


     If the verbose option is specified, aifcdecompress periodically prints
     messages as sample data is copied from the input file to the output file.


     The AIFF and AIFF-C file format specifications are published by Apple
     Computer Inc.


AUTHOR
     Silicon Graphics Inc.


SEE ALSO
     playaifc(1), recordaifc(1),
     aiff2aifc(1), aifccompress(1),
     dmconvert(1), mediaconvert(1),
     AIFF-C File Format Specification
     AFintro(3A), Introduction to the Audio File Library
     aware(5)


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