Audacity is a free audio editor. You can record sounds, play sounds, import and export WAV, AIFF, 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.Audacity is a
software that allows you to record andplay sounds.

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 Bass Boost, Wahwah, and Noise Removal, and it also
supports VST plug-in effects
.

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