
Playback the audio plus synthesized annotations, taking care to synchronize playback with display.Import note data from MIDI files, view it alongside other frequency scales and play it with the original audio.Import annotation layers from various text file formats.Run feature-extraction plugins to calculate annotations automatically, using algorithms such as beat trackers, pitch detectors, and so on.View the same data at multiple time resolutions simultaneously (for close-up and overview).Overlay annotations on top of one another with aligned scales, and overlay annotations on top of waveform or spectrogram views.Annotate audio data by adding labeled time points and defining segments, point values, and curves.Look at audio visualizations such as spectrogram views, with interactive adjustment of display parameters.Load audio files in WAV, Ogg, and MP3 formats, and view their waveforms.

Sonic Visualiser is Free Software, distributed under the GNU General Public License (v2 or later) and available for Linux, macOS, and Windows. The aim of Sonic Visualiser is to be the first program you reach for when want to study a musical recording rather than simply listen to it. Sonic Visualiser is an application for viewing and analyzing the contents of music audio files.
