Audacity - audio editor for sound processing
This is an easy-to-use, yet powerful audio file editor.
It works with a mixer built into a personal computer system, as well as external audio media.
It provides for the integration of effects: reversal, echo, phase vibrato (phaser), dynamic timbre change (wahwah).
In the editor, you can remove defects from the audio track: hiss, static noise, hum, and also adjust the pitch and tempo.
Works with formats: WAV, Ogg Vorbis, AIFF, AU, MP3, MPEG.
