The Audio File Library provides a uniform and elegant API for accessing a variety of audio file formats, such as AIFF/AIFF-C, WAVE, NeXT/Sun .snd/.au, Berkeley/IRCAM/CARL Sound File, Audio Visual Research, Amiga IFF/8SVX, and NIST SPHERE. Supported compression formats are currently G.711 mu-law and A-law and IMA and MS ADPCM.
Key goals of the Audio File Library are file format transparency and data format transparency. The same calls for opening a file, accessing and manipulating audio metadata (e.g. sample rate, sample format, textual information, MIDI parameters), and reading/writing sample data will work with any supported audio file format. Likewise, the format of the audio data presented to the application need not be tied to the format of the data contained in the file.
GNU Library General Public License
It should work on most flavors of Unix. Please get in touch with me if you've encountered (or surmounted) difficulty building the library on your computer.
What's new in version 0.2.6:
The Audio File Library is included in the GNOME and KDE projects.
For more information on audio file formats, the Audio File Format FAQ is a good source of information.