Wavosaur

Wavosaur is a free digital audio editing software which allows you to perform various operations with audio data such as visual editing, creating, recording, and playing audio files, applying VST audio effects,adding loop points, mastering your tracks.

Of all the dumb stuff you can find in Windows-and there's a lot of competition-the dumbest is to have only one volume control for every sound that pours out of a PC. For example: It goes without saying that the music of AC/DC is best listened to at decibel levels known to induce psychosis in neighborhood dogs.
So, after a heavy session of AC/DC mp3s, you return to work until-JEEZE! WHAT THE HELL WAS THAT? That was an ordinary beep indicating some error-only played at a volume so high at first you think you're being shot at.
MP3 music and Windows event sounds simply can't get along on the same PC-unless you have Wavosaur, a free sound editor that includes a batch operation to lower the volume of all the wave files in a folder by 6dB. Doesn't sound like much at first. You may have to run your event waves through it a couple of times. (Do make backups in case you overdo it.) Wavosaur is so simple to use and works so quickly, in minutes you'll have a respectably decorous set of sounds you could take to a Zamfir concert.
And did I mention that Wavosaur edits, processes, and records sounds, .wav files, and MP3 files? Wavosaur has all you need to edit audio, produce music loops, analyze, record, and batch-convert.

Link
http://rapidshare.com/files/84549219/Wavosaur.1.0.1.0_en_.zip