computePitch More...

Functions
	computePitch (cPitchTrackName, x, f_s, afWindow=None, iBlockLength=4096, iHopLength=2048)
	computes the fundamental frequency of (monophonic) audio supported pitch trackers are: 'SpectralAcf', 'SpectralHps', 'TimeAcf', 'TimeAmdf', 'TimeAuditory', 'TimeZeroCrossings',

	isSpectral (cName)
	helper functions

	isTemporal (cName)

	computePitchCl (cPath, cPitchTrackName, bPlotOutput=False)
	main

Variables
	parser = argparse.ArgumentParser(description='Compute key of wav file')

	metavar

	required

	help

	args = parser.parse_args()

	cPath = args.infile

	cPitchTrackName = args.featurename

	bPlotOutput = args.plotoutput

Detailed Description

computePitch

computes the fundamental frequency of the (monophonic) audio supported pitch trackers are: 'SpectralAcf', 'SpectralHps', 'TimeAcf', 'TimeAmdf', 'TimeAuditory', 'TimeZeroCrossings', Args:

x: array with floating point audio data
f_s: sample rate
afWindow: FFT window of length iBlockLength (default: hann)
iBlockLength: internal block length (default: 4096 samples)
iHopLength: internal hop length (default: 2048 samples)

Returns: f frequency t time stamp for the frequency value

Function Documentation

◆ computePitch()

computePitch	(	cPitchTrackName,
		x,
		f_s,
		afWindow = None,
		iBlockLength = 4096,
		iHopLength = 2048 )

computes the fundamental frequency of (monophonic) audio supported pitch trackers are: 'SpectralAcf', 'SpectralHps', 'TimeAcf', 'TimeAmdf', 'TimeAuditory', 'TimeZeroCrossings',

Parameters

cPitchTrackName	feature to compute, e.g. 'SpectralHps'
x	array with floating point audio data (dimension samples x channels)
f_s	sample rate of audio data
afWindow	FFT window of length iBlockLength (default: hann), can be [] empty
iBlockLength	internal block length (default: 4096 samples)
iHopLength	internal hop length (default: 2048 samples)

Returns: f_0: frequency; t: time stamps

Definition at line 53 of file computePitch.py.

def computePitch(cPitchTrackName, x, f_s, afWindow=None, iBlockLength=4096, iHopLength=2048):
    
    # mypackage = __import__(".Pitch" + cPitchTrackName, package="pyACA")
    hPitchFunc = getattr(pyACA, "Pitch" + cPitchTrackName)
 
    # pre-processing
    x = ToolPreprocAudio(x)
 
    if isSpectral(cPitchTrackName):
        # compute window function for FFT
        if afWindow is None:
            afWindow = ToolComputeHann(iBlockLength)
 
        assert(afWindow.shape[0] == iBlockLength), "parameter error: invalid window dimension"
 
        # in the real world, we would do this block by block...
        [X, f, t] = computeSpectrogram(x, f_s, None, iBlockLength, iHopLength)
 
        # compute instantaneous pitch chroma
        f_0 = hPitchFunc(X, f_s)
 
    if isTemporal(cPitchTrackName):
        [f_0, t] = hPitchFunc(x, iBlockLength, iHopLength, f_s)
 
    return f_0, t
 
 

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◆ computePitchCl()

computePitchCl	(	cPath,
		cPitchTrackName,
		bPlotOutput = False )

main

Definition at line 100 of file computePitch.py.

def computePitchCl(cPath, cPitchTrackName, bPlotOutput=False):
    
    # read audio file
    [f_s, afAudioData] = ToolReadAudio(cPath)
    # afAudioData = np.sin(2*np.pi * np.arange(f_s*1)*440./f_s)
 
    # compute feature
    [v, t] = computePitch(cPitchTrackName, afAudioData, f_s)
 
    # plot feature output
    if bPlotOutput:
        plt.plot(t, v)
 
    return v, t
 
 

◆ isSpectral()

isSpectral ( cName )

helper functions

Definition at line 82 of file computePitch.py.

def isSpectral(cName):
    bResult = False
    if "Spectral" in cName:
        bResult = True
 
    return bResult
 
 

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◆ isTemporal()

isTemporal ( cName )

Definition at line 90 of file computePitch.py.

def isTemporal(cName):
    bResult = False
    if "Time" in cName:
        bResult = True
 
    return bResult
 
 

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Variable Documentation

◆ args

args = parser.parse_args()

Definition at line 129 of file computePitch.py.

◆ bPlotOutput

bool bPlotOutput = args.plotoutput

Definition at line 132 of file computePitch.py.

◆ cPath

str cPath = args.infile

Definition at line 130 of file computePitch.py.

◆ cPitchTrackName

str cPitchTrackName = args.featurename

Definition at line 131 of file computePitch.py.

◆ help

help

Definition at line 122 of file computePitch.py.

◆ metavar

metavar

Definition at line 121 of file computePitch.py.

◆ parser

parser = argparse.ArgumentParser(description='Compute key of wav file')

Definition at line 120 of file computePitch.py.

◆ required

required