Wavosaur is a free audio editor with VST support and many features for editing
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SQIANG Easy Cue is a powerful Editor for cue file.
It's for editing Windows Media Audio (WMA) files
Audiodope the FREE audio editor, recorder, text to speech, freq analyzer, VST.
An easy and efficient FREE mp3 cutter which cuts MP3 files in various ways.
DME is a sort of notation software for .MUS files.