Audacity is shipped with many effects that you can use to modify your audio.
- Real-time preview of LADSPA, LV2, VST and Audio Unit (macOS) effects.
- Plug-in Manager handles plug-in installation and addition/removal of effects and generators from the menus.
- Generate tones, silence, noise, instruments or rhythm track.
- Change the pitch without altering the tempo.
- Change the tempo without altering the pitch.
- Noise Reduction to remove static, hiss, hum or other constant background noises.
- Alter frequencies with Equalization, Bass and Treble, High-Pass, Low-Pass and Notch Filter effects.
- Filter a frequency selection created in Spectrogram view or Spectral Selection Toolbar using spectral edit effects.
- Adjust volume with Compressor, Amplify, Normalize, Fade In/Out, Studio Fade Out, Crossfade Clips, Crossfade Tracks and Adjustable Fade effects.
- Reduce or Isolate Vocals given suitable stereo tracks (vocal reduction produces a stereo result).
- Create voice-overs for podcasts or DJ sets using Auto Duck effect.
- Other built-in effects include:
- Distortion
- Echo
- Limiter
- Paulstretch (extreme stretch)
- Phaser
- Reverb
- Reverse
- Truncate Silence
- Wahwah
- Run chains of effects on a project or multiple files usimg Macros.