Essentia 2.1 beta3

This pre-release includes the following changes:

• Build script updates:
  • Cross-compilation for iOS and Android
  • Support for javascript using Emscripten
  • Updated dependencies in static extractors (LibAv 11.2, Taglib 1.10)
  • Fixed cross-compilation for Windows
  • Homebrew formula for easy installation on OSX
  • Updated Debian packaging
  • All dependencies are now optional. Algorithms and examples relying on missing dependencies will be ignored.
  • New flags for building lightweight versions of Essentia
    • --lightweight=LIBS to specify dependencies to be included
    • --include-algos=ALGOS and --ignore-algos=ALGOS to specify algorithms to be included
• New algorithms:
  • SuperFlux algorithm for real-time onset detection (SuperFluxExtractor, SuperFluxNovelty)
  • Algorithms for sound modeling
    • Overlap-add (OverlapAdd)
    • Sine model analysis/synthesis (SineModelAnal, SineModelSynth)
    • Sine subtraction (SineSubtraction)
    • Sinusoidal plus Residual model analysis/synthesis (SprModelAnal, SprModelSynth)
    • Melody Analysis (monophonic/predominant)
    • HarmonicMask
    • Signal resampling (ResampleFFT)
  • New pitch-related algorithms
    • Multi-pitch estimation in polyphonic music (MultiPitchKlapuri, MultiPitchMelodia)
    • Adaptation of Melodia algorithm for monophonic signals (PitchMelodia)
    • Yin pitch detection algorithm (PitchYin)
    • Pitch contour segmentation into notes (PitchContourSegmentation)
    • Vibrato detection (Vibrato)
  • BPM estimation on loops (PercivalEnhanceHarmonics, PercivalEvaluatePulseTrains, LoopBpmConfidence, LoopBpmEstimator, PercivalBpmEstimator)
  • STFT on complex inputs ( FFTC)
  • ConstantQ and Chromagram (still in experimental stage)
  • TriangularBands
  • Lightweight spectral centroid implementation (SpectralCentroidTime)
  • Chords detection on beat segments (ChordsDetectionBeats)
  • VectorRealAccumulator
• Improved algorithms:
  • LoudnessEBUR128 algorithms are now finalized (includes bug-fixes)
  • FFT now supports KissFFT and Accelerate FFT libraries as an alternative to FFTW
  • New profiles for Key estimation (including profiles for electronic music)
  • New 'generalized' parameter in Autocorrelation algorithm
  • New 'scale' and 'shift' parameters in UnaryOperator algorithm
  • New 'normalized' parameter in Windowing algorithm
  • New 'inputSize' parameter in GFCC algorithm
  • Added support for 8kHz for EqualLoudness algorithm
  • LogAttackTime now outputs attack times
  • BpmHistogramDescriptors now outputs a complete histogram
  • ChordsDescriptors now throws exception on incorrect chords
  • Refactored AudioLoader and AudioWriter algorithms. Use libavresample, remove support for libswresample
  • Rename PitchFilterMakam to PitchFilter. Allow filtering negative energy values. Remove optional 'octaveFilter' parameter
  • Rename PredominantMelody algorithm to PredominantPitchMelodia
• Bug-fixes:
  • Fix wrong behavior of HarmonicPeaks that was indirectly affecting results in HPCP, Key, Tristimulus and OddToEvenHarmonicEnergy
  • Fixed filter coefficients in BandReject and BandPass
  • Fixed weightings in NoveltyCurve
  • Different key profiles in Key streaming algorithm now work correctly
  • Bug fixes in Envelope, TonicIndianArtMusic, RhythmExtractor2013, PitchYinFFT, BpmHistogramDescriptors, ReplayGain streaming
• Updated extractors (including Freesound extractor)
• Improved documentation
  • Fresh new design
  • Algorithms are now organized by categories.
  • Improved and rewritten algorithm descriptions
  • New python examples and tutorials
• More minor fixes, improvements and code cleanup
• Updated unit tests. Audio files for tests are now hosted in a separate repository

Known issues:

• Some unit tests fail (#316)