TPV | SuperCollider 3.13.0 Help

Description

Implementation of the McAulay and Quatieri 1986 sinusoidal model, as described in:

McAulay, R. and Quatieri, T. (1986) "Speech analysis/Synthesis based on a sinusoidal representation". IEEE Transactions on Acoustics, Speech, and Signal Processing 34(4): 744--754

Class Methods

.ar

Arguments:

chain	[fft] - Audio input to track, which has been pre-analysed by the FFT UGen; see examples below for the expected FFT size
windowsize	Window size used for FFT
hopsize	hop size for FFT, typically half window size
maxpeaks	Absolute maximum number of allowed peaks to be detected in the spectrum
currentpeaks	Current number of allowed peaks to be detected in the spectrum
freqmult	Resynthesis parameter to change frequency; currently causes a gross multiplication of frequency of all sinusoidal components, no envelope compensation
tolerance	Search area for matching peaks; within tolerance spectral bins
noisefloor	Minimum magnitude for a candidate peak

Examples

// for sampling rates 88200 and 96000, replace LocalBuf(1024, 1) by LocalBuf(2048, 1) below

d = Buffer.read(s, Platform.resourceDir +/+ "sounds/a11wlk01.wav");

(
{

var in, fft;

in = SoundIn.ar(0); // PlayBuf.ar(1, d, BufRateScale.kr(d), 1, 0, 1);
    fft = FFT(LocalBuf(1024, 1), in, wintype:1);
    DelayN.ar(TPV.ar(fft, 1024, 512, 70, MouseX.kr(1,70), MouseY.kr(0.25,3), 4, 0.2), 3, 3)

}.play
)

(
{

var in, fft;

in = PlayBuf.ar(1, d, BufRateScale.kr(d),1,0,1);
    fft = FFT(LocalBuf(1024, 1), in, wintype:1);
    TPV.ar(fft, 1024, 512, 50, 50, 1.0, MouseX.kr(0.1,100), MouseY.kr(-20,40).dbamp);

}.play
)

(
{

var in, fft;

in = PlayBuf.ar(1, d, BufRateScale.kr(d), 1, 0, 1);
    fft = FFT(LocalBuf(1024, 1), in);
    TPV.ar(fft, 1024, 512, 1,1);

}.plot(0.05, s, nil, -1.5, 1.5);
)

// residual

(
{

var in, fft, output;
    var input, inputAmp, threshhold, gate;

in = PlayBuf.ar(1, d, BufRateScale.kr(d), 1, 0, 1);
    //in = SoundIn.ar(0);
    //inputAmp = Amplitude.kr(input);
    //threshhold = 0.001;    // noise gating threshold
    //gate = Lag.kr(inputAmp > threshhold, 0.01);
    //in = input * gate;

fft = FFT(LocalBuf(1024, 1), in, wintype:1);

output = TPV.ar(fft, 1024, 512, 50, 50, 1.0, 4, 0.2);

// delay by 512 samples for output, then phase measurement is from centre of frame, so

output - DelayN.ar(in, 0.1, (512 + 512) / s.sampleRate) * 0.1

}.play
)

d.free

helpfile source: source/NCAnalysisUGens/sc/HelpSource/Classes/TPV.schelp
link::sc3-plugins/Classes/TPV::

TPVExtension

Description

Class Methods

.ar

Arguments:

Examples

TPV
Extension