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CHANGELOG.md

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Changes

##v0.3.0

Bug fixes

- Fixed numpy array indices to force integer values
- ``librosa.util.frame`` now warns if the input data is non-contiguous
- Fixed a formatting error in ``librosa.display.time_ticks()``
- Added a warning if ``scikits.samplerate`` is not detected

Features

- New module ``librosa.chord`` for training chord recognition models
- Parabolic interpolation piptracking ``librosa.feature.piptrack()``
- ``librosa.localmax()`` now supports multi-dimensional slicing
- New example scripts
- Improved documentation
- Added the ``librosa.util.FeatureExtractor`` class, which allows librosa functions
  to act as feature extraction stages in `sklearn`
- New module ``librosa.effects`` for time-domain audio processing
- Added demo notebooks for the ``librosa.effects`` and ``librosa.util.FeatureExtractor``
- Added a full-track audio example, ``librosa.util.example_audio_file()``
- Added peak-frequency sorting of basis elements in ``librosa.decompose.decompose()``

Other changes

- Spectrogram frames are now centered, rather than left-aligned.  This removes the
  need for window correction in ``librosa.frames_to_time()``
- Accelerated constant-Q transform ``librosa.cqt()``
- PEP8 compliance
- Removed normalization from ``librosa.feature.logfsgram()``
- Efficiency improvements by ensuring memory contiguity 
- ``librosa.logamplitude()`` now supports functional reference power, in addition
  to scalar values
- Improved ``librosa.feature.delta()``
- Additional padding options to ``librosa.feature.stack_memory()``
- ``librosa.cqt`` and ``librosa.feature.logfsgram`` now use the same parameter
  formats ``(fmin, n_bins, bins_per_octave)``.
- Updated demo notebook(s) to IPython 2.0
- Moved ``perceptual_weighting()`` from ``librosa.feature`` into ``librosa.core``
- Moved ``stack_memory()`` from ``librosa.segment`` into ``librosa.feature``
- Standardized ``librosa.output.annotation`` input format to match ``mir_eval``
- Standardized variable names (e.g., ``onset_envelope``).

##v0.2.1

Bug fixes

  • fixed an off-by-one error in librosa.onset.onset_strength()
  • fixed a sign-flip error in librosa.output.write_wav()
  • removed all mutable object default parameters

Features

  • added option centering to librosa.onset.onset_strength() to resolve frame-centering issues with sliding window STFT
  • added frame-center correction to librosa.core.frames_to_time() and librosa.core.time_to_frames()
  • added librosa.util.pad_center()
  • added librosa.output.annotation()
  • added librosa.output.times_csv()
  • accelerated librosa.core.stft() and ifgram()
  • added librosa.util.frame for in-place signal framing
  • librosa.beat.beat_track now supports user-supplied tempo
  • added librosa.util.normalize()
  • added librosa.util.find_files()
  • added librosa.util.axis_sort()
  • new module: librosa.util()
  • librosa.filters.constant_q now support padding
  • added boolean input support for librosa.display.cmap()
  • speedup in librosa.core.cqt()

Other changes

  • optimized default parameters for librosa.onset.onset_detect
  • set librosa.filters.mel parameter n_mels=128 by default
  • librosa.feature.chromagram() and logfsgram() now use power instead of energy
  • librosa.display.specshow() with y_axis='chroma' now labels as pitch class
  • set librosa.core.cqt parameter resolution=2 by default
  • set librosa.feature.chromagram parameter octwidth=2 by default

v0.2.0

Bug fixes

  • fixed default librosa.core.stft, istft, ifgram to match specification
  • fixed a float->int bug in peak_pick
  • better memory efficiency
  • librosa.segment.recurrence_matrix corrects for width suppression
  • fixed a divide-by-0 error in the beat tracker
  • fixed a bug in tempo estimation with short windows
  • librosa.feature.sync now supports 1d arrays
  • fixed a bug in beat trimming
  • fixed a bug in librosa.core.stft when calculating window size
  • fixed librosa.core.resample to support stereo signals

Features

  • added filters option to cqt
  • added window function support to istft
  • added an IPython notebook demo
  • added librosa.features.delta for computing temporal difference features
  • new examples scripts: tuning, hpss
  • added optional trimming to librosa.segment.stack_memory
  • librosa.onset.onset_strength now takes generic spectrogram function feature
  • compute reference power directly in librosa.core.logamplitude
  • color-blind-friendly default color maps in librosa.display.cmap
  • librosa.core.onset_strength now accepts an aggregator
  • added librosa.feature.perceptual_weighting
  • added tuning estimation to librosa.feature.chromagram
  • added librosa.core.A_weighting
  • vectorized frequency converters
  • added librosa.core.cqt_frequencies to get CQT frequencies
  • librosa.core.cqt basic constant-Q transform implementation
  • librosa.filters.cq_to_chroma to convert log-frequency to chroma
  • added librosa.core.fft_frequencies
  • librosa.decompose.hpss can now return masking matrices
  • added reversal for librosa.segment.structure_feature
  • added librosa.core.time_to_frames
  • added cent notation to librosa.core.midi_to_note
  • added time-series or spectrogram input options to chromagram, logfsgram, melspectrogram, and mfcc
  • new module: librosa.display
  • librosa.output.segment_csv => librosa.output.frames_csv
  • migrated frequency converters to librosa.core
  • new module: librosa.filters
  • librosa.decompose.hpss now supports complex-valued STFT matrices
  • librosa.decompose.decompose() supports sklearn decomposition objects
  • added librosa.core.phase_vocoder
  • new module: librosa.onset; migrated onset strength from librosa.beat
  • added librosa.core.pick_peaks
  • librosa.core.load() supports offset and duration parameters
  • librosa.core.magphase() to separate magnitude and phase from a complex matrix
  • new module: librosa.segment

Other changes

  • onset_estimate_bpm => estimate_tempo
  • removed n_fft from librosa.core.istft()
  • librosa.core.mel_frequencies returns n_mels values by default
  • changed default librosa.decompose.hpss window to 31
  • disabled onset de-trending by default in librosa.onset.onset_strength
  • added complex-value warning to librosa.display.specshow
  • broke compatibilty with ifgram.m; librosa.core.ifgram now matches stft
  • changed default beat tracker settings
  • migrated hpss into librosa.decompose
  • changed default librosa.decompose.hpss power parameter to 2.0
  • librosa.core.load() now returns single-precision by default
  • standardized n_fft=2048, hop_length=512 for most functions
  • refactored tempo estimator

v0.1.0

Initial public release.