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. We hope Sonic Visualiser will be of particular interest to musicologists, archivists, signal-processing researchers and anyone else looking for a friendly way to take a look at what lies inside the audio file. Beini 1.2.5 Manual there. Sonic Visualiser contains features for the following: • Load audio files in WAV, Ogg and MP3 formats, and view their waveforms.

• Look at audio visualisations such as spectrogram views, with interactive adjustment of display parameters. • Annotate audio data by adding labelled time points and defining segments, point values and curves. • Overlay annotations on top of one another with aligned scales, and overlay annotations on top of waveform or spectrogram views. • View the same data at multiple time resolutions simultaneously (for close-up and overview). • Run feature-extraction plugins to calculate annotations automatically, using algorithms such as beat trackers, pitch detectors and so on.