A family member was unable to play some WAV files on two Windows XP systems using Winamp, though other WAV files played without problem in Winamp and the ones that would not play in Winamp would play in Windows Media Player (WMP). When I checked the codec used in those that would not play, I found that it was MPEG Layer-3 (MP3), while the ones that would play were encoded with PCM. I was able to resolve the problem by associating Winamp's DirectShow codec with WAV files.
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