Chromagram

standard mode | Tonal category

Inputs

  • frame (vector_real) - the input audio frame

Outputs

  • chromagram (vector_real) - the magnitude constant-Q chromagram

Parameters

  • binsPerOctave (integer ∈ [1, ∞), default = 12) :
    number of bins per octave
  • minFrequency (real ∈ [1, ∞), default = 32.7) :
    minimum frequency [Hz]
  • minimumKernelSize (integer ∈ [2, ∞), default = 4) :
    minimum size allowed for frequency kernels
  • normalizeType (string ∈ {none, unit_sum, unit_max}, default = unit_max) :
    normalize type
  • numberBins (integer ∈ [1, ∞), default = 84) :
    number of frequency bins, starting at minFrequency
  • sampleRate (real ∈ [0, ∞), default = 44100) :
    FFT sampling rate [Hz]
  • scale (real ∈ [0, ∞), default = 1) :
    filters scale. Larger values use longer windows
  • threshold (real ∈ [0, 1), default = 0.01) :
    bins whose magnitude is below this quantile are discarded
  • windowType (string ∈ {hamming, hann, hannnsgcq, triangular, square, blackmanharris62, blackmanharris70, blackmanharris74, blackmanharris92}, default = hann) :
    the window type, which can be 'hamming', 'hann', 'triangular', 'square' or 'blackmanharrisXX'
  • zeroPhase (bool ∈ {true, false}, default = true) :
    a boolean value that enables zero-phase windowing. Input audio frames should be windowed with the same phase mode

Description

This algorithm computes the Constant-Q chromagram using FFT. See ConstantQ algorithm for more details.

See also

Chromagram (streaming) ConstantQ (standard) ConstantQ (streaming) FFT (standard) FFT (streaming)

Standard algorithms

AfterMaxToBeforeMaxEnergyRatio | AllPass | AudioLoader | AudioOnsetsMarker | AudioWriter | AutoCorrelation | BFCC | BPF | BandPass | BandReject | BarkBands | BeatTrackerDegara | BeatTrackerMultiFeature | Beatogram | BeatsLoudness | BinaryOperator | BinaryOperatorStream | BpmHistogram | BpmHistogramDescriptors | BpmRubato | CartesianToPolar | CentralMoments | Centroid | ChordsDescriptors | ChordsDetection | ChordsDetectionBeats | ChromaCrossSimilarity | Chromagram | Chromaprinter | ClickDetector | Clipper | ConstantQ | CoverSongSimilarity | Crest | CrossCorrelation | CrossSimilarityMatrix | CubicSpline | DCRemoval | DCT | Danceability | Decrease | Derivative | DerivativeSFX | DiscontinuityDetector | Dissonance | DistributionShape | Duration | DynamicComplexity | ERBBands | EasyLoader | EffectiveDuration | Energy | EnergyBand | EnergyBandRatio | Entropy | Envelope | EqloudLoader | EqualLoudness | Extractor | FFT | FFTC | FadeDetection | FalseStereoDetector | Flatness | FlatnessDB | FlatnessSFX | Flux | FrameCutter | FrameGenerator | FrameToReal | FreesoundExtractor | FrequencyBands | GFCC | GaiaTransform | GapsDetector | GeometricMean | HFC | HPCP | HarmonicBpm | HarmonicMask | HarmonicModelAnal | HarmonicPeaks | HighPass | HighResolutionFeatures | Histogram | HprModelAnal | HpsModelAnal | HumDetector | IDCT | IFFT | IFFTC | IIR | Inharmonicity | InstantPower | Intensity | Key | KeyExtractor | LPC | Larm | Leq | LevelExtractor | LogAttackTime | LogSpectrum | LoopBpmConfidence | LoopBpmEstimator | Loudness | LoudnessEBUR128 | LoudnessVickers | LowLevelSpectralEqloudExtractor | LowLevelSpectralExtractor | LowPass | MFCC | Magnitude | MaxFilter | MaxMagFreq | MaxToTotal | Mean | Median | MedianFilter | MelBands | MetadataReader | Meter | MinMax | MinToTotal | MonoLoader | MonoMixer | MonoWriter | MovingAverage | MultiPitchKlapuri | MultiPitchMelodia | Multiplexer | MusicExtractor | MusicExtractorSVM | NNLSChroma | NSGConstantQ | NSGIConstantQ | NoiseAdder | NoiseBurstDetector | NoveltyCurve | NoveltyCurveFixedBpmEstimator | OddToEvenHarmonicEnergyRatio | OnsetDetection | OnsetDetectionGlobal | OnsetRate | Onsets | OverlapAdd | PCA | Panning | PeakDetection | PercivalBpmEstimator | PercivalEnhanceHarmonics | PercivalEvaluatePulseTrains | PitchContourSegmentation | PitchContours | PitchContoursMelody | PitchContoursMonoMelody | PitchContoursMultiMelody | PitchFilter | PitchMelodia | PitchSalience | PitchSalienceFunction | PitchSalienceFunctionPeaks | PitchYin | PitchYinFFT | PitchYinProbabilistic | PitchYinProbabilities | PitchYinProbabilitiesHMM | PolarToCartesian | PoolAggregator | PowerMean | PowerSpectrum | PredominantPitchMelodia | RMS | RawMoments | ReplayGain | Resample | ResampleFFT | RhythmDescriptors | RhythmExtractor | RhythmExtractor2013 | RhythmTransform | RollOff | SBic | SNR | SaturationDetector | Scale | SilenceRate | SineModelAnal | SineModelSynth | SineSubtraction | SingleBeatLoudness | SingleGaussian | Slicer | SpectralCentroidTime | SpectralComplexity | SpectralContrast | SpectralPeaks | SpectralWhitening | Spectrum | SpectrumCQ | SpectrumToCent | Spline | SprModelAnal | SprModelSynth | SpsModelAnal | SpsModelSynth | StartStopCut | StartStopSilence | StereoDemuxer | StereoMuxer | StereoTrimmer | StochasticModelAnal | StochasticModelSynth | StrongDecay | StrongPeak | SuperFluxExtractor | SuperFluxNovelty | SuperFluxPeaks | TCToTotal | TempoScaleBands | TempoTap | TempoTapDegara | TempoTapMaxAgreement | TempoTapTicks | TensorflowInputMusiCNN | TensorflowInputVGGish | TensorflowPredict | TensorflowPredictMusiCNN | TensorflowPredictVGGish | TonalExtractor | TonicIndianArtMusic | TriangularBands | TriangularBarkBands | Trimmer | Tristimulus | TruePeakDetector | TuningFrequency | TuningFrequencyExtractor | UnaryOperator | UnaryOperatorStream | Variance | Vibrato | Viterbi | WarpedAutoCorrelation | Welch | Windowing | YamlInput | YamlOutput | ZeroCrossingRate