Audacity is a sound editing program which can record, playback, and mix sounds or apply effects using a variety of filters.
Audacity lets you edit your sounds using Cut, Copy and Paste (with unlimited Undo) and mix multiple tracks together. Save your files in a number of formats, including WAV, Ogg Vorbis and AIFF, or use Audacity’s native project format for high performance editing. It also has a built-in amplitude envelope editor, a customisable spectrogram mode and a frequency analysis window for audio analysis applications. Built-in effects include Bass Boost, Wahwah, and Noise Removal.
Use Audacity to record your own podcasts, mix music, or just be creative!