Waveform sound (Microsoft Windows)
WAV is a file extension for an audio file format created by Microsoft. The WAV file has become a standard PC audio file format for everything from system and game sounds to CD-quality audio.
Also referred to as pulse code modulation (PCM) or waveform audio, a WAV file is uncompressed audio. A Wave file also stores information about the file's number of tracks, sample rate, bit depth, and whether it's mono or stereo.
MIME type: audio/wav, audio/x-wav, audio/wave, audio/x-pn-wav
Learn more about .WAV files:
See questions and answers about audio at ITKnowledgeExchange.com.
Wikipedia has an entry about wave files.