Audacity 1.20 released.

Audacity is an open-source, free sound editor for Windows, Linux or Mac OSX.Great for manipulating sound effects for Flash movies etc if you don't have access to expensive sound-editing suites for full-time, professional use. You can record sounds, play sounds, import and export WAV, AIFF, Ogg Vorbis, and MP3 files, and more. Use it to edit your sounds using Cut, Copy and Paste (with unlimited Undo), mix tracks together, or apply effects to your recordings. It also has a built-in amplitude envelope editor, a customizable spectrogram mode and a frequency analysis window for audio analysis applications. Built-in effects include Echo, Change Tempo, and Noise Removal.