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libaudiofile
The Silicon Graphics Audio File Library provides a uniform programming interface to standard digital audio file formats. Currently supported sound file formats include AIFF/AIFF-C, WAVE, NeXT/Sun .snd/.au, and Berkeley/IRCAM/CARL. 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.