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#!/usr/bin/env python |
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# CREATED:2015-12-12 18:20:37 by Brian McFee <[email protected]> |
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r''' |
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Sonification |
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============ |
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.. autosummary:: |
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:toctree: generated/ |
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sonify |
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''' |
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import six |
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import numpy as np |
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import mir_eval.sonify |
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from mir_eval.util import filter_kwargs |
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from .eval import validate_annotation |
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from .exceptions import NamespaceError |
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__all__ = ['sonify'] |
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def clicks(annotation, sr=22050, length=None, **kwargs): |
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'''Sonify clicks timings |
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''' |
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interval, _ = annotation.data.to_interval_values() |
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return filter_kwargs(mir_eval.sonify.clicks, interval[:, 0], |
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fs=sr, length=length, **kwargs) |
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def chord(annotation, sr=22050, length=None, **kwargs): |
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'''Sonify chords''' |
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intervals, chords = annotation.data.to_interval_values() |
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return filter_kwargs(mir_eval.sonify.chords, |
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chords, intervals, |
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fs=sr, length=length, |
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**kwargs) |
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def pitch_midi(annotation, sr=22050, length=None, **kwargs): |
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'''Sonify midi pitches''' |
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intervals, notes = annotation.data.to_interval_values() |
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freqs = 440.0 * (2.0 ** ((np.arange(128) - 69.0)/12.0)) |
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gram = np.zeros((len(freqs), len(notes))) |
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for t, n in enumerate(notes): |
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gram[n, t] = 1.0 |
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# Compress for efficiency |
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idx = gram.max(axis=1) > 0 |
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gram = gram[idx] |
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freqs = freqs[idx] |
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return filter_kwargs(mir_eval.sonify.time_frequency, |
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gram, freqs, intervals, |
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fs=sr, length=length, |
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**kwargs) |
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SONIFY_MAPPING = {'beat.*|segment.*|onset.*': clicks, |
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'chord|chord_harte': chord, |
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'pitch_midi': pitch_midi} |
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def sonify(annotation, sr=22050, duration=None, **kwargs): |
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'''Sonify a jams annotation through mir_eval |
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Parameters |
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---------- |
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annotation : jams.Annotation |
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The annotation to sonify |
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sr = : int > 0 |
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The sampling rate of the output waveform |
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duration : float (optional) |
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Optional length (in seconds) of the output waveform |
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kwargs |
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Additional keyword arguments to mir_eval.sonify functions |
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Returns |
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------- |
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y_sonified : np.ndarray |
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The waveform of the sonified annotation |
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Raises |
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------ |
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NamespaceError |
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If the annotation has an un-sonifiable namespace |
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''' |
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length = None |
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if duration is not None: |
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length = int(duration * sr) |
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for namespace, func in six.iteritems(SONIFY_MAPPING): |
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try: |
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validate_annotation(annotation, namespace) |
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return func(annotation, sr=sr, length=length, **kwargs) |
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except NamespaceError: |
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pass |
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raise NamespaceError('Unable to sonify annotation of namespace="{:s}"' |
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.format(annotation.namespace)) |
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marl /
jams
