SingleBeatLoudness
extends BaseAlgorithm
in package
SingleBeatLoudness
Inputs:
[vector_real] beat - audio segement containing a beat
Outputs:
[real] loudness - the beat's energy across the whole spectrum [vector_real] loudnessBandRatio - the beat's energy ratio for each band
Parameters:
beatDuration: real ∈ (0,inf) (default = 0.0500000007451) window size for the beat's energy computation (the window starts at the onset) [s]
beatWindowDuration: real ∈ (0,inf) (default = 0.10000000149) window size for the beat's onset detection [s]
frequencyBands: vector_real (default = [0, 200, 400, 800, 1600, 3200, 22000]) frequency bands
onsetStart: string ∈ {sumEnergy,peakEnergy} (default = "sumEnergy") criteria for finding the start of the beat
sampleRate: real ∈ (0,inf) (default = 44100) the audio sampling rate [Hz]
Description:
This algorithm computes the spectrum energy of a single beat across the whole frequency range and on each specified frequency band given an audio segment. It detects the onset of the beat within the input segment, computes spectrum on a window starting on this onset, and estimates energy (see Energy and EnergyBandRatio algorithms). The frequency bands used by default are: 0-200 Hz, 200-400 Hz, 400-800 Hz, 800-1600 Hz, 1600-3200 Hz, 3200-22000Hz, following E. Scheirer [1].
This algorithm throws an exception either when parameter beatDuration is larger than beatWindowSize or when the size of the input beat segment is less than beatWindowSize plus beatDuration.
References: [1] E. D. Scheirer, "Tempo and beat analysis of acoustic musical signals," The Journal of the Acoustical Society of America, vol. 103, p. 588, 1998.
Category: Rhythm Mode: standard
Table of Contents
Properties
- $algorithmName : string
- $category : string
- $essentia : EssentiaFFI
- $mode : string
- $parameters : array<string|int, mixed>
- $algorithmHandle : CData|null
- $configured : bool
Methods
- __construct() : mixed
- __destruct() : mixed
- compute() : array<string|int, mixed>
- getAlgorithmName() : string
- getCategory() : string
- getMode() : string
- getParameters() : array<string|int, mixed>
- setParameter() : self
- configure() : void
- isValidParameter() : bool
- validateInput() : void
- cleanupAlgorithm() : void
- configureAlgorithmParameters() : void
- estimateOutputSize() : int
- executeAlgorithm() : array<string|int, mixed>
- executeGenericAlgorithm() : array<string|int, mixed>
- executeSpecificAlgorithm() : array<string|int, mixed>
- getAlgorithmCreateFunction() : string
- getValidParameters() : array<string|int, mixed>
- initializeAlgorithm() : void
- prepareInput() : mixed
- processOutput() : array<string|int, mixed>
- processRhythmOutput() : array<string|int, mixed>
- processSpectralOutput() : array<string|int, mixed>
- processStatsOutput() : array<string|int, mixed>
- processTemporalOutput() : array<string|int, mixed>
- processTonalOutput() : array<string|int, mixed>
- setAlgorithmParameter() : void
- setArrayParameter() : void
- validateAlgorithmInput() : void
Properties
$algorithmName
protected
string
$algorithmName
= 'SingleBeatLoudness'
$category
protected
string
$category
= 'Rhythm'
$essentia
protected
EssentiaFFI
$essentia
$mode
protected
string
$mode
= 'standard'
$parameters
protected
array<string|int, mixed>
$parameters
= []
$algorithmHandle
private
CData|null
$algorithmHandle
= null
$configured
private
bool
$configured
= false
Methods
__construct()
public
__construct([array<string|int, mixed> $parameters = [] ]) : mixed
Parameters
- $parameters : array<string|int, mixed> = []
__destruct()
public
__destruct() : mixed
compute()
public
compute(mixed $input) : array<string|int, mixed>
Parameters
- $input : mixed
Return values
array<string|int, mixed>getAlgorithmName()
public
getAlgorithmName() : string
Return values
stringgetCategory()
public
getCategory() : string
Return values
stringgetMode()
public
getMode() : string
Return values
stringgetParameters()
public
getParameters() : array<string|int, mixed>
Return values
array<string|int, mixed>setParameter()
public
setParameter(string $key, mixed $value) : self
Parameters
- $key : string
- $value : mixed
Return values
selfconfigure()
protected
configure(array<string|int, mixed> $parameters) : void
Parameters
- $parameters : array<string|int, mixed>
isValidParameter()
protected
isValidParameter(string $parameter) : bool
Parameters
- $parameter : string
Return values
boolvalidateInput()
protected
validateInput(mixed $input, string $expectedType) : void
Parameters
- $input : mixed
- $expectedType : string
cleanupAlgorithm()
private
cleanupAlgorithm() : void
configureAlgorithmParameters()
private
configureAlgorithmParameters() : void
estimateOutputSize()
private
estimateOutputSize(mixed $input) : int
Parameters
- $input : mixed
Return values
intexecuteAlgorithm()
private
executeAlgorithm(mixed $input) : array<string|int, mixed>
Parameters
- $input : mixed
Return values
array<string|int, mixed>executeGenericAlgorithm()
private
executeGenericAlgorithm(FFI $ffi, mixed $input) : array<string|int, mixed>
Parameters
- $ffi : FFI
- $input : mixed
Return values
array<string|int, mixed>executeSpecificAlgorithm()
private
executeSpecificAlgorithm(FFI $ffi, mixed $input) : array<string|int, mixed>
Parameters
- $ffi : FFI
- $input : mixed
Return values
array<string|int, mixed>getAlgorithmCreateFunction()
private
getAlgorithmCreateFunction() : string
Return values
stringgetValidParameters()
private
getValidParameters() : array<string|int, mixed>
Return values
array<string|int, mixed>initializeAlgorithm()
private
initializeAlgorithm() : void
prepareInput()
private
prepareInput(mixed $input) : mixed
Parameters
- $input : mixed
processOutput()
private
processOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>processRhythmOutput()
private
processRhythmOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>processSpectralOutput()
private
processSpectralOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>processStatsOutput()
private
processStatsOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>processTemporalOutput()
private
processTemporalOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>processTonalOutput()
private
processTonalOutput(array<string|int, mixed> $result) : array<string|int, mixed>
Parameters
- $result : array<string|int, mixed>
Return values
array<string|int, mixed>setAlgorithmParameter()
private
setAlgorithmParameter(FFI $ffi, string $key, mixed $value) : void
Parameters
- $ffi : FFI
- $key : string
- $value : mixed
setArrayParameter()
private
setArrayParameter(FFI $ffi, string $key, array<string|int, mixed> $value) : void
Parameters
- $ffi : FFI
- $key : string
- $value : array<string|int, mixed>
validateAlgorithmInput()
private
validateAlgorithmInput(mixed $input) : void
Parameters
- $input : mixed