1zhouhaoran1/moonmel/src/features/onset

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/onset does not have a README file

OnsetConfig

pub(all) struct OnsetConfig {
  mode : OnsetMethod
  normalize : Bool
} derive(Eq, @moonbitlang/core/debug.Debug
Debug)

Configuration for onset strength envelope extraction.

OnsetConfig::default

source

fn OnsetConfig::default() -> OnsetConfig

Default configuration: Spectral flux with normalization.

OnsetConfig::equal

source

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

OnsetConfig::not_equal

source

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

OnsetConfig::to_repr

source

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

OnsetMethod

source

pub(all) enum OnsetMethod {
  SpectralFlux
  SuperFlux(Int)
  Energy
} derive(Eq, @moonbitlang/core/debug.Debug
Debug)

Onset strength computation method.

OnsetMethod::equal

source

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

OnsetMethod::not_equal

source

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

OnsetMethod::to_repr

source

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

onset_detect_audio

source

fn onset_detect_audio(audio : @1zhouhaoran1/moonmel/src/core/types.AudioBuffer
AudioBuffer, config : @1zhouhaoran1/moonmel/src/core/types.FeatureConfig
FeatureConfig, onset_config? : OnsetConfig, delta? : Double, wait? : Int) -> Result[Array[Int], @1zhouhaoran1/moonmel/src/core/types.MelError
MelError]

Detect onset event frame indices directly from AudioBuffer.

onset_strength

source

fn onset_strength(spec : @1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix, config : OnsetConfig) -> Array[Double]

Compute onset strength envelope from spectrogram.

onset_strength_audio

source

fn onset_strength_audio(audio : @1zhouhaoran1/moonmel/src/core/types.AudioBuffer
AudioBuffer, config : @1zhouhaoran1/moonmel/src/core/types.FeatureConfig
FeatureConfig, onset_config? : OnsetConfig) -> Result[Array[Double], @1zhouhaoran1/moonmel/src/core/types.MelError
MelError]

Extract onset strength envelope directly from AudioBuffer.

peak_pick

source

fn peak_pick(envelope : Array[Double], pre_max? : Int, post_max? : Int, pre_avg? : Int, post_avg? : Int, delta? : Double, wait? : Int) -> Array[Int]

Adaptive local threshold peak picking for onset detection (librosa.util.peak_pick aligned).

spectral_flux

source

fn spectral_flux(spec : @1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix) -> Array[Double]

Standard spectral flux: half-wave rectified difference across successive frames.

super_flux

source

fn super_flux(spec : @1zhouhaoran1/moonmel/src/core/types.FeatureMatrix
FeatureMatrix, filter_size : Int) -> Array[Double]

SuperFlux: spectral difference relative to maximum-filtered previous frame (Boeck & Widmer 2013). Filter sizes <= 1 disable frequency spreading and use ordinary spectral flux.