1zhouhaoran1/moonmel/src/features/chroma

src

features

README
U
AnalysisResult
U
AudioBuffer
U
BiquadCoeffs
U
BiquadFilter
U
ChromaNorm
U
Complex
U
ContrastConfig
U
CqtConfig
U
FeatureConfig
U
FeatureMatrix
U
Formant
U
FormantConfig
U
FormantFrame
U
HpssConfig
U
HpssResult
U
LogScale
U
LoudnessResult
U
LpcResult
U
MaskMode
U
MelError
U
MelNorm
U
MelScale
U
MultiChannelAudioBuffer
U
OnsetConfig
U
OnsetMethod
U
PitchTrack
U
StreamingExtractor
U
TempoConfig
U
TempogramResult
U
WindowType
U
YinConfig
V
analyze
V
apply_k_weighting
V
autocorrelation
V
bluestein_fft
V
bluestein_ifft
V
chroma_filterbank
V
chroma_from_spectrogram
V
chroma_stft
V
compute_delta
V
compute_energy
V
compute_rms
V
cqt
V
cqt_frequencies
V
create_streaming_extractor
V
create_window
V
cumulative_mean_normalized_difference
V
dct_ii
V
decode_wav
V
deemphasis
V
dft
V
difference_function
V
durand_kerner
V
fft
V
fft_padded
V
formant_frequencies
V
formant_track
V
formants_frame
V
harmonic_energy_ratio
V
hpss
V
hpss_from_audio
V
idft
V
ifft
V
interchannel_level_difference
V
interchannel_phase_difference
V
istft
V
levinson_durbin
V
log_mel_spectrogram
V
loudness_meter
V
lpc
V
lpc_features
V
lpc_residual
V
lpc_to_lpcc
V
lpcc_features
V
median_filter_1d
V
median_filter_freq
V
median_filter_time
V
mel_filterbank
V
mel_spectrogram
V
mfcc
V
multichannel_mel
V
multichannel_mfcc
V
multichannel_stft
V
onset_detect_audio
V
onset_strength
V
onset_strength_audio
V
pad_reflect
V
peak_pick
V
percussive_energy_ratio
V
phase_vocoder
V
pitch_class_name
V
pitch_shift
V
pitch_yin
V
power_to_db
V
preemphasis
V
resample
V
resample_linear
V
resample_polyphase
V
resample_sinc
V
resample_to_length
V
rfft_padded
V
spectral_centroid
V
spectral_contrast
V
spectral_contrast_audio
V
spectral_flatness
V
spectral_flux
V
spectral_rolloff
V
stft
V
stft_complex
V
super_flux
V
tempogram
V
tempogram_from_onset
V
time_stretch
V
true_peak_db
V
yin_frame
V
zero_crossing_rate

1zhouhaoran1/moonmel/src/features/chroma does not have a README file

ChromaNorm

pub(all) enum ChromaNorm {
  None
  L1
  L2
  Max
} derive(Eq, @moonbitlang/core/debug.Debug
Debug)

Normalization mode for Chroma feature vectors across time frames.

ChromaNorm::equal

source

fn ChromaNorm::equal(ChromaNorm, ChromaNorm) -> Bool

ChromaNorm::not_equal

source

fn ChromaNorm::not_equal(x : ChromaNorm, y : ChromaNorm) -> Bool

ChromaNorm::to_repr

source

fn ChromaNorm::to_repr(ChromaNorm) -> @moonbitlang/core/debug.Repr
Repr

chroma_filterbank

source

fn chroma_filterbank(sample_rate : Int, n_fft : Int, tuning : Double, f_min : Double) -> @1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix

Generates a 12-bin Chroma filterbank projecting frequency bins to 12 semitones. Returns a FeatureMatrix of shape [12, n_bins].

chroma_from_spectrogram

source

fn chroma_from_spectrogram(spectrogram : @1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix, sample_rate : Int, n_fft : Int, norm : ChromaNorm, tuning : Double, f_min : Double) -> Result[@1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix, @1zhouhaoran1/moonmel/src/core/types.MelError
MelError]

Extracts 12-bin Chroma representation from a 2D power/magnitude spectrogram. tuning must be finite; f_min must be finite and in [0, sample_rate / 2].

chroma_stft

source

fn chroma_stft(samples : Array[Double], config : @1zhouhaoran1/moonmel/src/core/types.FeatureConfig
FeatureConfig, norm : ChromaNorm) -> Result[@1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix, @1zhouhaoran1/moonmel/src/core/types.MelError
MelError]

End-to-end 12-bin Chroma STFT feature extraction pipeline.

pitch_class_name

source

fn pitch_class_name(idx : Int) -> String

Returns standard pitch class name for index 0..=11 (0 = C, 9 = A, etc.).

Source Files

chroma.mbt

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#ChromaNorm

#ChromaNorm::equal

#ChromaNorm::not_equal

#ChromaNorm::to_repr

#chroma_filterbank

#chroma_from_spectrogram

#chroma_stft

#pitch_class_name

Source Files

ChromaNorm

ChromaNorm::equal

ChromaNorm::not_equal

ChromaNorm::to_repr

chroma_filterbank

chroma_from_spectrogram

chroma_stft

pitch_class_name