Kostenloser Audio Analyser: Sonic Visualiser

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Alle Funktionen sind darauf ausgelegt besonders ergonomisch und informativ für den Benutzer zu sein. Sonic Visualiser bietet eine Funktion, mit der man Notizen zu den Audiofiles abspeichern kann, in denen der Inhalt der Audiofiles beschrieben werden kann.

Das Programm bietet auch eine automatisierte Variante der Analyse für Plugins im Vamp Analysis Plugin Format. Die typischen Standard-Effekte können ebenfalls auf ein Audiofile angewandt werden.

Sonic Visualiser ist als kostenloser Download unter der GNU General Public License erhältlich und kann für Linux, OS/X und Windows genutzt werden.

Die Features des Sonic Visualiser

  • 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.
  • Import annotation layers from various text file formats.
  • Import note data from MIDI files, view it alongside other
    frequency scales, and play it with the original audio.
  • Play back the audio plus synthesised annotations, taking
    care to synchronise playback with display.
  • Select areas of interest, optionally snapping to nearby
    feature locations, and audition individual and comparative
    selections in seamless loops.
  • Time-stretch playback, slowing right down or speeding up
    to a tiny fraction or huge multiple of the original speed
    while retaining a synchronised display.
  • Export audio regions and annotation layers to external files.

 

Die Ziele bei der Entwicklung:

  • To provide the best available core
    waveform and spectrogram audio visualisations for use with
    substantial files of music audio data.
  • To facilitate ready comparisons between different kinds of
    data, for example by making it easy to overlay one set of data
    on another, or display the same data in more than one way at the
    same time.
  • To be straightforward. The user interface should be simpler
    to learn and to explain than the internal data structures. In
    this respect, Sonic Visualiser aims to resemble a consumer
    audio application.
  • To be responsive, slick, and enjoyable. Even if you have to
    wait for your results to be calculated, you should be able to do
    something else with the audio data while you wait. Sonic
    Visualiser is pervasively multithreaded, loves multiprocessor
    and multicore systems, and can make good use of fast processors
    with plenty of memory.
  • To handle large data sets. The work Sonic Visualiser does
    is intrinsically processor-hungry and (often) memory-hungry, but
    the aim is to allow you to work with long audio files on
    machines with modest CPU and memory where reasonable. (Disk
    space is another matter. Sonic Visualiser eats that.)

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