Raven Lite

Raven Lite is a free software program that lets users record, save, and visualize sounds as spectrograms and waveforms. Raven Lite is intended for students, educators, and hobbyists, and can be used for learning about sounds, as an aid in birdsong recognition, and in musical instruction.


View any combination of waveform, spectrogram, spectrogram slice (single spectral frame), or selection (average) spectrum views.

Multi-line wraparound spectrogram views let you look at longer time periods while preserving a fine temporal viewing scale.

Presets let you easily switch among frequently used configurations without having to specify numerous parameters for window layouts, color schemes, measurement sets, spectrograms, recorders, band filters, selection labels, and detectors.

A color scheme consists of a spectrogram colormap relating power values to display colors, and color specifications for elements within each view (such as selections, axes, backgrounds, title text, etc.). Choose from eight predefined colormaps, and edit the color for each element in a view.

Raven checks for software updates each time it is opened.

Paged sound windows enable fast and easy navigation and viewing of recordings of any length, consisting of any number of sound files (for example, a full year of continuous recording in 1-hour sound files).

Visually review long recordings (for example to search for specific sounds of interest) many times faster than real-time speed.

Open multiple sound files as a single continuous sound sequence. Useful for long-term passive acoustic or soundscape monitoring projects.

Open sound files saved in WAV, AIF, MP3, and FLAC formats.

Open sound files with any number of audio channels. Open all channels or a specified subset of channels.

Export images of signal views or sound windows via a variety of graphics file formats, or via the system clipboard for easy import into word-processing, presentation, and graphics programs.

Raven Pro supports audio data acquisition using the computer’s built-in sound card, NI-DAQ (National Instruments Data Acquisition hardware), or ASIO (Audio Stream In/Out) audio input devices. NI-DAQ devices provide input capabilities of up to 32 channels with an adjustable voltage range, and ASIO devices provide 24-bit audio sample size capabilities.

Raven displays waveform, spectrogram, and spectrogram slice views in real time during data acquisition.

Define rectangular time-frequency selections around signals of interest. Selections can be created manually by drawing boxes on spectrograms or other views. Selections measurements are shown in rows in a spreadsheet-like selection table. In addition to basic measurements computed from the audio signal, selection tables can include a user-defined annotation.

Selection tables can be saved as text files for easy import into statistics, spreadsheet, or other programs.


  • Price
  • Multiple views and view types
  • Advanced spectrogram slice and selection spectrum views

  • Highly customizable control of spectrogram parameters

  • View parameter linkage
  • Multi-line views
  • Workspaces
  • Configuration presets
  • Color schemes
  • Automatic updates
  • Work with long recordings irrespective of memory limitations

  • Auto-paging
  • File sequences
  • Multiple audio formats (WAV, FLAC, AIF, MP3)

  • Multi-channel signals
  • Image export
  • Support for multiple audio input hardware options

  • Real-time views during acquisition
  • Selection and basic annotation
  • Selection, measurement, and multiple annotations

  • Advanced measurements and annotation

  • Selection table export
  • Spectrogram correlation
  • Automated event detection
  • Selection review and rapid annotation
  • Compare selection tables

Raven Pro

  • $50 - $800

Raven Lite

  • Free

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The K. Lisa Yang Center for Conservation Bioacoustics is pleased to announce the release of a series of short video tutorials introducing the most widely used features of Raven Pro 1.6 bioacoustic analysis software.

The tutorials are available in:

  • English
  • French
  • Hindi
  • Indonesian
  • Portuguese
  • Spanish

Although these tutorials "begin at the beginning," experienced users may learn something as well.

Most of the tutorial content is applicable to Raven Lite.