Features

Features

For more information on these features, see the Audacity Manual.

Recording

Audacity can record live audio through a microphone or mixer, or digitize recordings from other media. With some sound cards, and on any recent version of Windows, Audacity can also capture streaming audio.

  • Device Toolbar manages multiple recording and playback devices.
  • Level meters can monitor volume levels before, during and after recording. Clipping can be displayed in the waveform or in a label track.
  • Record from microphone, line input, USB/Firewire devices and others.
  • Record computer playback on Windows Vista and later by choosing “Windows WASAPI” host in Device Toolbar then a “loopback” input.
  • Timer Record and Sound Activated Recording features.
  • Dub over existing tracks to create multi-track recordings.
  • Record at very low latencies on supported devices on Linux by using Audacity with JACK.
  • Record at sample rates up to 192,000 Hz (subject to appropriate hardware and host selection). Up to 384,000 Hz is supported for appropriate high-resolution devices on Windows (using WASAPI), Mac OS X, and Linux.
  • Record at 24-bit depth on Windows (using Windows WASAPI host), Mac OS X or Linux (using ALSA or JACK host).
  • Record multiple channels at once (subject to appropriate hardware).

Import and Export

Import sound files, edit them, and combine them with other files or new recordings. Export your recordings in many different file formats, including multiple files at once.

  • Import and Export WAV, AIFF, AU, FLAC and Ogg Vorbis files.
  • Fast “On-Demand” import of WAV or AIFF files (letting you start work with the files almost immediately) if read directly from source.
  • Import and export all formats supported by libsndfile such as GSM 6.10, 32-bit and 64-bit float WAV, RF64, and U/A-Law.
  • Import MPEG audio (including MP2 and MP3 files) using libmad.
  • Import raw (headerless) audio files using the “Import Raw” command.
  • Create WAV or AIFF files suitable for burning to audio CD.
  • Export MP3 files with the optional LAME encoder library.
  • Import and export AC3, M4A/M4R (AAC) and WMA with the optional FFmpeg library (this also supports import of audio from video files).

Sound Quality

  • Supports 16-bit, 24-bit and 32-bit (floating point) samples (the latter preserves samples in excess of full scale).
  • Sample rates and formats are converted using high-quality resampling and dithering.
  • Tracks with different sample rates or formats are converted automatically in real time.

Editing

Accessibility

Effects

Plug-ins

Analysis

      • Spectrogram view mode for visualizing and selecting frequencies.
      • Plot Spectrum window for detailed frequency analysis.
      • Sample Data Export for exporting a file containing amplitude values for each sample in the selection.
      • Contrast Analysis for analyzing average RMS volume differences between foreground speech and background music.
      • Support for adding VAMP analysis plug-ins.

Free and Cross-Platform

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