Wavosaur is a free audio editor with VST support and many features for editing
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Powerful audio recorder, editor, burner software for CD, MP3, WAV, WMA
Merge & join MP3 WAV WMA AAC M4A M4R FLAC AC3 OGG AIFF AU audio files into one
A bit-perfect audio editor that doesn't modify samples unless they need to be.
Remove unwanted portions of your MP3 files – without losing any of the quality
Allows you to pack/join your MP3 files in a single file.