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.WV files are audio files compressed using WavPack Hybrid Lossless Compression. WavPack compression supports mono, stereo, and multichannel audio; it is compatible with most PCM audio formats including 8, 16, 24, and 32-bit recordings, and supports sampling rates from 6 to 192 kHz.

There are lots of free audio players available which can be used to play .WV file. Few of them are below.

1. SongBird
2. Winamp