What Is Audacity

Audacity is a free, open source multi-track audio editor and recorder that runs on Windows, macOS, and Linux. The official repo, audacity/audacity, has about 19.0k stars on GitHub and is licensed under GPLv2, built with C++ and wxWidgets. It is not a pro DAW, but for everyday needs like podcast recording, audio editing, noise reduction, and format conversion, it is the go to free tool.

Its positioning is clear: instead of a complex mixing console and effect chain, it makes the most common operations, recording, cutting, noise reduction, and exporting, something anyone can do. You need no acoustics knowledge; install it and record, then a quick cleanup and you have a shippable file. If you want to record video courses or streams with picture, Audacity alone is not enough; pair it with a tool like What Is OBS Studio and How to Use It.

Key Features

  • Multi-track recording and editing. Record multiple sources at once, then cut, copy, splice, and mix by track, which is great for podcast segments.
  • Noise reduction and repair. Built in noise removal, compression, equalization, and reverb clean up background hiss and pops.
  • Format support. Import and export WAV, MP3, FLAC, OGG, AIFF, and common formats without worrying about conversion losses.
  • Spectrum analysis and visualization. Spectrogram and waveform views locate noise and transients far more accurately than blind listening.
  • Plugins. Compatible with LADSPA, Nyquist, VST, and LV2 plugins, so you can add more effects as needed.
  • Labels and chapters. Add labels inside the audio for podcast segments and export with chapter markers.

How to Install

  1. Open https://www.audacityteam.org/download/, pick the Windows version, and download the installer.
  2. Double click audacity-win-*.*.*-64bit.exe and follow the wizard.
  3. You can also get the build from GitHub Releases at https://github.com/audacity/audacity/releases.
  4. Prefer a package manager? Run winget install Audacity.Audacity.
  5. On first launch, follow the wizard to pick language and default audio device.

How to Use It

  1. Choose the recording device: in the device dropdown on the toolbar, select a microphone or sound-card loopback, then click the red Record button.
  2. Import material: File > Import > Audio loads an existing file; drag the waveform to edit.
  3. Editing: select a waveform segment and press Delete, or use Ctrl+T to trim silence.
  4. Noise reduction: record a stretch of pure ambient noise, then Effect > Noise Reduction > Get Noise Profile, and apply reduction to the whole clip.
  5. Export: File > Export > Export as MP3/WAV, set bitrate and metadata, then save.

Things to Watch

  • Sample rate. Keep recording and export at 44100 Hz or 48000 Hz; mixing them can make pitch drift.
  • Recording level. Avoid overload; near 0 dB clips and distorts, so keep peaks around -6 dB.
  • Privacy. Before recording on a computer, make sure you have the other party's consent; do not capture sensitive conversations.
  • Plugins. Only install trusted VST and LV2 plugins; unknown ones can cause instability or security issues.
  • License. The software is GPL, and redistribution must follow the license terms and keep the notice.

Download

  • Official download https://www.audacityteam.org/download/
  • GitHub Releases https://github.com/audacity/audacity/releases

Official Site

  • https://www.audacityteam.org

Getting Started

Run the noise reduction flow first; it is the most worthwhile Audacity skill. Record ambient noise, get the profile, then reduce, and it directly suppresses air conditioner and electrical hum. Watch the level meter while recording and do not let it sit in the red. Export podcasts as MP3 at 128 to 192 kbps, which is clear enough and small. Save the project often: an Audacity project and the exported file are two different things, and closing without saving the project means you cannot tweak later.

FAQ

My Audacity recording has noise. How do I fix it? First tell device noise from environment noise. Device noise needs a better mic or sound card noise reduction; environment noise uses the built in noise removal, sample a silent take for the profile then apply, but do not push the strength too hard or the voice goes muffled.

Exported MP3 plays silently on my phone? Usually the wrong channel or sample rate at export. Export as standard mono or stereo MP3 at 44100 Hz and it almost never fails.

Can Audacity record internal computer audio? Yes. Pick the sound card loopback (Stereo Mix or Wave Out) in the device dropdown to record system sound; if that option is missing, install a virtual audio cable. For recording with picture, you need OBS.