Metadata-Version: 1.1
Name: zounds
Version: 0.25.12
Summary: UNKNOWN
Home-page: https://github.com/JohnVinyard/zounds
Author: John Vinyard
Author-email: john.vinyard@gmail.com
License: UNKNOWN
Download-URL: https://github.com/jvinyard/zounds/tarball/0.25.12
Description-Content-Type: UNKNOWN
Description: |Build Status| |Coverage Status| |PyPI| |Docs|
        
        Motivation
        ==========
        
        Zounds is a python library for working with sound. Its primary goals are
        to:
        
        -  layer semantically meaningful audio manipulations on top of numpy
           arrays
        -  `help to organize the definition and persistence of audio processing
           pipelines and machine learning experiments with
           sound <https://github.com/JohnVinyard/zounds/tree/master/zounds/learn>`__
        
        Audio processing graphs and machine learning pipelines are defined using
        `featureflow <https://github.com/JohnVinyard/featureflow>`__.
        
        A Quick Example
        ===============
        
        .. code:: python
        
            import zounds
        
            Resampled = zounds.resampled(resample_to=zounds.SR11025())
        
        
            @zounds.simple_in_memory_settings
            class Sound(Resampled):
                """
                A simple pipeline that computes a perceptually weighted modified discrete
                cosine transform, and "persists" feature data in an in-memory store.
                """
        
                windowed = zounds.ArrayWithUnitsFeature(
                    zounds.SlidingWindow,
                    needs=Resampled.resampled,
                    wscheme=zounds.HalfLapped(),
                    wfunc=zounds.OggVorbisWindowingFunc(),
                    store=True)
        
                mdct = zounds.ArrayWithUnitsFeature(
                    zounds.MDCT,
                    needs=windowed,
                    store=False)
        
                weighted = zounds.ArrayWithUnitsFeature(
                    zounds.FrequencyWeighting,
                    weighting=zounds.AWeighting(),
                    needs=mdct,
                    store=False)
        
            if __name__ == '__main__':
        
                # produce some audio to test our pipeline
                synth = zounds.SineSynthesizer(zounds.SR44100())
                samples = synth.synthesize(zounds.Seconds(5), [220., 440., 880.])
        
                # process the audio, and fetch features from our in-memory store
                _id = Sound.process(meta=samples.encode())
                sound = Sound(_id)
        
                # produce a time slice that starts half a second in, and lasts for two
                # seconds
                time_slice = zounds.TimeSlice(
                    start=zounds.Milliseconds(500),
                    duration=zounds.Seconds(2))
                # grab all the frequency information, for a subset of the duration
                snippet = sound.weighted[time_slice, :]
        
                # produce a frequency slice that spans 400hz-500hz
                freq_band = zounds.FrequencyBand(400, 500)
                # grab a subset of frequency information for the duration of the sound
                a440 = sound.mdct[:, freq_band]
        
                # produce a new set of coefficients where only the 440hz sine wave is
                # present
                filtered = sound.mdct.copy()
                filtered[:] = 0
                filtered[:, freq_band] = a440
        
                # apply a geometric scale, which more closely matches human pitch
                # perception, and apply it to the linear frequency axis
                scale = zounds.GeometricScale(50, 4000, 0.05, 100)
                bands = [sound.weighted[:, band] for band in scale]
                band_sizes = [band.shape[1] for band in bands]
        
                # reconstruct audio from the MDCT coefficients
                mdct_synth = zounds.MDCTSynthesizer()
                reconstructed = mdct_synth.synthesize(sound.mdct)
                filtered_reconstruction = mdct_synth.synthesize(filtered)
        
                # start an in-browser REPL that will allow you to listen to and visualize
                # the variables defined above (and any new ones you create in the session)
                app = zounds.ZoundsApp(
                    model=Sound,
                    audio_feature=Sound.ogg,
                    visualization_feature=Sound.weighted,
                    globals=globals(),
                    locals=locals())
                app.start(8888)
        
        Find more inspiration in the `examples
        folder <https://github.com/JohnVinyard/zounds/tree/master/examples>`__,
        or on the `blog <http://johnvinyard.github.io/>`__.
        
        Installation
        ============
        
        Libsndfile Issues
        -----------------
        
        Installation currently requires you to build lbiflac and libsndfile from
        source, because of `an outstanding
        issue <https://github.com/bastibe/PySoundFile/issues/130>`__ that will
        be corrected when the apt package is updated to ``libsndfile 1.0.26``.
        Download and run `this
        script <https://raw.githubusercontent.com/JohnVinyard/zounds/master/setup.sh>`__
        to handle this step.
        
        Numpy and Scipy
        ---------------
        
        The `Anaconda <https://www.continuum.io/downloads>`__ python
        distribution is highly recommended.
        
        Zounds
        ------
        
        Finally, just:
        
        .. code:: bash
        
            pip install zounds
        
        .. |Build Status| image:: https://travis-ci.org/JohnVinyard/zounds.svg?branch=master
           :target: https://travis-ci.org/JohnVinyard/zounds
        .. |Coverage Status| image:: https://coveralls.io/repos/github/JohnVinyard/zounds/badge.svg?branch=master
           :target: https://coveralls.io/github/JohnVinyard/zounds?branch=master
        .. |PyPI| image:: https://img.shields.io/pypi/v/zounds.svg
           :target: https://pypi.python.org/pypi/zounds
        .. |Docs| image:: https://img.shields.io/badge/docs-latest-brightgreen.svg?style=flat&maxAge=86400
           :target: http://zounds.readthedocs.io/en/latest/?badge=latest
        
Platform: UNKNOWN
