Audacity is a free, easy-to-use audio editor and recorder for Windows, Mac OS X, GNU/Linux, and other operating systems. Audacity can record live audio through a microphone or mixer, or digitize recordings from cassette tapes, vinyl records, or minidiscs. With some sound cards, it can also capture streaming audio.

Audacity Features

• Record live audio.
• Edit Ogg Vorbis, MP3, and WAV sound files.
• Record from microphone, line input, or other sources.
• Change the pitch without altering the tempo, or vice-versa.
• Record and edit 16-bit, 24-bit, and 32-bit (floating point) samples.
• Add new effects with LADSPA plugins.