Sonic Visualiser. 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. Audiotool. aM laboratory.