WAV files are excellent quality sound files that are most often associated with "events" such as starting up Windows, exiting Windows, errors, etc. To see a list of these events, go to the "Sounds" icon in the Windows Control Panel. There you can see a list all the events and associate the WAV files with the events. Event sounds are usually short in length. Longer playing WAV files might include an entire song, however these take up a large amount of disk space and have relatively long download times.