library for a similar graphical user interface on various operating systems. Large array of digital effects and plug-ins. Additional effects can be written with Nyquist, a Lisp dialect. Built-in LADSPA, VST and Nyquist plug-in support Noise Reduction based on sampling the noise to be minimized Vocal Reduction and Isolation for creation of karaoke tracks and isolated vocal tracks Pitch adjustment maintaining speed, and speed adjustment maintaining pitch Saving and loading user presets for effect settings across sessions (version 2.1.0 on) Support for multi-channel modes with sampling rates up to 96 kHz with 32 bits per sample Audio spectrum analysis using the Fourier transform algorithm Importing and exporting WAV, AIFF, MP3 (via LAME encoder, now integrated), Ogg Vorbis, and all file formats supported by libsndfile library. Version 1.3.2 and later supported Free Lossless Audio Codec (FLAC). Version 1.3.6 and later also supported additional formats such as WMA, AAC, AMR and AC3 via the optional FFmpeg library. Detection of dropout errors while recording with an overburdened CPU From 2.3.2 on, a mod-script-pipe for driving Audacity from Python (can be enabled in Preferences) Full online user manual for the application, Four user-selectable visual themes (version 2.2.0 on) Four user-selectable colorways for waveform display in audio tracks (version 2.2.1 on) Audacity supports the LV2 open standard for plugins, and can therefore load software like Calf Studio Gear. The version 3.0 update (March 2021) introduced a new project file format, .aup3, using an SQLite database to store each project in a single database file. The version 3.0.3 update (July 2021) introduced crash reporting and error reporting for database errors; optional update checking was also added. The version 3.1.0 update (October 2021) introduced clip handles, smart clips and playback looping. In April 2022, an official Audacity app was added to the Microsoft Store. The version 3.2.0 update (September 2022) added real-time effects, VST3 support and a streamlined interface. Limitations Audacity does not natively import or export WMA, AAC, AC3 or most other proprietary or restricted file formats; rather, an optional FFmpeg library is required. Audacity does not support instrument VST (VSTi) plugins. There are no real-time track equalizers or other real-time effect slots for recording, only playback. Language support In addition to English, Audacity is available in Afrikaans, Arabic, Basque, Bulgarian, Catalan, Chinese (simplified), Chinese (traditional), Corsican, Czech, Danish, Dutch, Finnish, French, Galician, German, Greek, Hungarian, Irish, Italian, Japanese, Lithuanian, Macedonian, Marathi, Norwegian (Bokmål), Polish, Portuguese