Difference between revisions of "Gabor Modules"

Revision as of 23:17, 3 May 2009 (view source) Norbert (talk | contribs) ← Older edit		Revision as of 23:18, 3 May 2009 (view source) Norbert (talk | contribs) Newer edit →
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	* gbr.psy~ ... Pysch synchronous (YIN-based) signal slicing		* gbr.psy~ ... Pysch synchronous (YIN-based) signal slicing
	* gbr.resample ... Resampling		* gbr.resample ... Resampling
		+	* gbr.schedule~ ... Delay/scheduler respecting Gabor timing
	* gbr.slice~ ... Signal slicing		* gbr.slice~ ... Signal slicing
	* gbr.tapin~ ... Input tap for write delay line		* gbr.tapin~ ... Input tap for write delay line

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Revision as of 23:18, 3 May 2009

• gbr.addenv ... Additive synthesis: generate partials with a given envelope
• gbr.addpartials ... Additive synthesis: generate partials with given frequencies and amplitudes
• gbr.autox ... Auto correlation and similar
• gbr.bands ... FFT filter bands
• gbr.bq ... Constant Q
• gbr.copy ... Copy vector (fmat) out of a delay line or an fmat or fvec
• gbr.crossx ... Cross correlation and similar
• gbr.dct ... Discrete cosine transform
• gbr.dline~ ... Classical delay line
• gbr.drain~ ... Forward delay line
• gbr.fft ... Fast Fourier transform
• gbr.fire~ ... Gabor timing impulse generator
• gbr.gen= ... Generate waveform/function
• gbr.harms ... Estimate harmonics from a given spectrum (or any other vector)
• gbr.ifft ... Inverse fast Fourier transform
• gbr.lifter ... Cepstral liftering
• gbr.lpc ... Linear prediction coefficients
• gbr.mask ... Partial masking using critical band width
• gbr.morph ... Partials sets interpolation
• gbr.ola~ ... Overlap-add
• gbr.paste ... Paste a grain (fmat or fvec) into a drain
• gbr.peaks ... Estimate peaks (partials) from a given spectrum (or any other vector)
• gbr.preemphasis ... Simple first order difference filter
• gbr.psy~ ... Pysch synchronous (YIN-based) signal slicing
• gbr.resample ... Resampling
• gbr.schedule~ ... Delay/scheduler respecting Gabor timing
• gbr.slice~ ... Signal slicing
• gbr.tapin~ ... Input tap for write delay line
• gbr.tapout~ ... Output tap for read delay line
• gbr.timer~ ... Gabor timer
• gbr.trace ... Trace and index peaks
• gbr.wind= ... Apply a window to an incoming frame, grain or wave
• gbr.yin ... Fundamental frequency estimation after de Cheveigne and Kawahara

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gbr.addenv		Additive synthesis: generate partials with a given envelope
		Adds partials with a spectral envolope (given as a vector or list) to an incoming spectrum using the FFT-1 technique. The output is typically connected to gbr.ifft (in real mode) or another gbr.addenv or gbr.addpartials module.
		arguments: 1 <num: max> - maximum number of partials [64] 2 <num: size> - spectrum size (0: input size) [0] attributes: coefs <num: coefs> - set number of FFT-1 spectral bin coefficients [8] noisy <bool: switch> - enable/disbale noisiness ['off'] zero <bool: switch> - zero spectrum before adding partials ['off'] messages: postdoc - post external doc to console inlets: 1 <fmat: spectrum> - complex vector (only positive frequencies) to which to add the generated partials 2 <num|fmat|fvec|list: freq(s)> - fundamental frequency (num: for harmonics) or vector of partials frequencies 3 <num|fmat|fvec|list: spectral envelope> - spectral envelope (given values will be linearly interpolated) 4 <num|fmat|fvec|list: phase(s)> - phase (num: for all partials) or vector of phases for the given partials outlets: 1 <fmat: spectrum> - output spectrum with added partials

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gbr.addpartials		Additive synthesis: generate partials with given frequencies and amplitudes
		Adds partials (given as a vector or list) to an incoming spectrum using the FFT-1 technique. The output is typically connected to gbr.ifft (in real mode) or another gbr.addpartials or gbr.addenv module. Frequencies and amplitudes can be given by separated vectors with separated inputs (input format 'vec') or as a single matrix to the first inlet. The input format (attribute @format) determines the interpretation of the columns of the incoming matrix: 'fa' requires 2 columns with frequencies and amplitudes, 'ifa' requires 3 columns with partial indices, frequencies and amplitudes.
		arguments: 1 <num: max> - maximum number of partials [64] 2 <num: size> - spectrum size (0: input size) [0] attributes: coefs <num: num> - set number of FFT-1 spectral bin coefficients [8] noisy <bool: switch> - enable/disbale noisiness ['off'] zero <bool: switch> - zero spectrum before adding partials ['off'] format <'vec'|'fa'|'ifa': format> - set input matrix/vector format ['vec'] messages: postdoc - post external doc to console inlets: 1 <fmat: spectrum> - complex vector (only positive frequencies) to which to add the generated partials 2 <num|fmat|fvec|list: freq(s)> - set fundamental frequency (num: for harmonics) or vector of partials frequencies 3 <num|fmat|fvec|list: amp(s)> - set amplitude (num: for harmonics) or vector of partials amplitudes 4 <num|fmat|fvec|list: phase(s)> - set phase (num: for all partials) or vector of phases for the given partials outlets: 1 <fmat: spectrum> - output spectrum with added partials

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gbr.autox		Auto correlation and similar
		Calculates autocorrelation, distance, quadratic distance, sum magnitude difference function and accumulated difference function (yin).
		arguments: 1 <num: size> - calculation size [256] 2 <num: width> - window width [256] attributes: scale <num: factor> - set scaling factor [1] mode <'corr'|'dist'|'dist2'|'smdf'|'yin': mode> - set calculation mode ['corr'] out <fmat: output> - set output vector messages: postdoc - post external doc to console width <num: width> - set window width size <num: size> - set calculation size (maximum output size) inlets: 1 <fmat|fvec: vector> - input vector outlets: 1 <fmat: vector> - auto correlation vector

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gbr.bands		FFT filter bands
		Calculate filter bands from FFT spectrum.
		arguments: <num: min> <num: max> | <num: insize> <num: outsize> - init bands boundaries or input spectrum size and number of output bands attributes: bands <'bounds'|'mel'|'htkmel'|'fcmel': mode> - set the bands mode [bounds] minfreq <num: min> - set the output minimum frequency in hz maxfreq <num: max> - set the output maximum frequency in hz scale <num: scale> - set the bands filter scale integ <'sqrabs'|'abs': spec> - set the spectrum integration type [sqrabs] domain <num: domain> - set domain of output bands (<= 0 sets to sr/2) domscale <num: factor> - set scaling factor of output bands (overwrites domain and down) [1] down <num: down> - set down sampling factor of incoming frames (overwrites domain and domscale) out <fmat: out> - set output matrix messages: postdoc - post external doc to console insize <num: insize> - set the input spectrum size outsize <num: outsize> - set the number of output bands bounds <list: boundaries> - set band boundaries getstate - get the internal weights matrix inlets: 1 <fmat|fvec: input> - input spectrum outlets: 1 <fmat: output> - output bands 2 <fmat: weights> - internal weights matrix

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gbr.bq		Constant Q
		Calculates a constant Q transform on an incoming spectrum [J.Brown, M.Puckette 1992]. Its input is typically connected to gbr.fft (in real mode).
		arguments: <num: FFT size> <num: min freq> <num: channels per octave> <num: threshold> <num: number of channels> - filter kernel parameters attributes: channels <num: channels> - set number of channels to calculate [all] messages: postdoc - post external doc to console inlets: 1 <fmat: spectrum> - complex vector of (positive frequencies) outlets: 1 <fmat: coefficients> - filter bands

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gbr.copy		Copy vector (fmat) out of a delay line or an fmat or fvec
		Copies a grain (fmat vector) of a given duration out of a delay line at a given delay time and outputs an fmat reference. If the given delay time is less than the the duration the vector will be shortened
		arguments: 1 <delayline|fmat|fvec: source> - source reference 2 <num: duration> - grain duration [100] attributes: unit <'msec'|'sec'|'samp': unit> - set time unit to msecs, secs or samples ['msec'] out <fmat: output> - set output vector messages: postdoc - post external doc to console set <delayline|fmat|fvec: source> - set source bang - copy vector from the beginning of the delay line and output inlets: 1 <num: delay> - copy and output grain at given delay position 2 <num: duration> - set duration outlets: 1 <fmat: vector> - copied grain

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gbr.crossx		Cross correlation and similar
		Calculates correlation, distance, quadratic distance and sum magnitude difference function.
		arguments: 1 <num: size> - calculation size [256] 2 <num: width> - window width [256] 3 <fmat|fvec: vector> - right operand attributes: scale <num: factor> - set scaling factor [1] mode <'corr'|'dist'|'dist2'|'smdf': mode> - set calculation mode out <fmat: output> - set output vector messages: postdoc - post external doc to console size <num: size> - set calculation size (maximum output size) width <num: width> - set window width inlets: 1 <fmat|fvec: vector> - left input vector 2 <fmat|fvec: vector> - right input vector outlets: 1 <fmat: vector> - cross correlation vector

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gbr.dct		Discrete cosine transform
		Calculates a DCT of the incoming vector.
		arguments: 1 <num: input size> - size of input vector [40] 2 <num: output size> - number of DCT coefficients to be calculated [13] attributes: mode <'slaney'|'htk'|fc'> - set discrete cosine transform mode ['slaney'] out <fmat: output> - set output vector messages: postdoc - post external doc to console insize <num: input size> - set size input vector outsize <num: output size> - set number of DCT coefficients to be calculated getstate - get the internal weights matrix inlets: 1 <fmat|fvec: vector> - input vector outlets: 1 <fmat: vector> - DCT coefficients 2 <fmat: vector> - internal weights matrix

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gbr.dline~		Classical delay line
		Delay line to be used with gbr.copy and gbr.tapout~.
		arguments: <sym: name> <num: size in given unit> - give name and size [none 100] attributes: scope <'local'|'global': scope> - set delayline name scope ['global'] unit <'msec'|'sec'|'samp': unit> - set time unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console clear - zero delay line freeze <'0'|'1': freeze>] - enable/disable delay line freeze inlets: 1 - write signal into delay line outlets: 1 - thru output (for order-forcing)

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gbr.drain~		Forward delay line
		Delay line to write with different delays to be used with gbr.paste and gbr.tapin~.
		arguments: <sym: name> <num: size in given unit> - give name and size [none 100] attributes: scope <'local'|'global': scope> - set delayline name scope ['global'] unit <'msec'|'sec'|'samp': unit> - set time unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console clear - clear delay line inlets: 1 - messages only outlets: 1 - sum delay line output

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gbr.fft		Fast Fourier transform
		Calculates FFT on incoming vector.
		arguments: 1 <num: size> - FFT size (rounded to the next power of 2) [512] attributes: scale <num: factor> - scaling factor (0 --> 1 / FFT size) [1] mode <'auto'|'complex'|'real': mode> - FFT mode ['auto'] out <fmat: output> - set output vector messages: postdoc - post external doc to console inlets: 1 <fmat|fvec: vector> - real or conplex input vector outlets: 1 <fmat: vector> - real or conplex output vector

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gbr.fire~		Gabor timing impulse generator
		Periodically outputs a given fmat or a bang within the Gabor scheduling scheme.
		arguments: <num: period> [<fmat: vector>] - frequency/period and fmat to fire [0] attributes: unit <'hz'|'msec'|'sec'|'samp'|'midi'|'midicent': unit> - set frequency/period unit to Hz, msec or samples ['hz'] period <num: period> - set frequency/period [0] var <num: freq var> - set period variation (0...1) [0] out <fmat: out> - set output fmat messages: postdoc - post external doc to console inlets: 1 <num: freq/period> - fire frequency/period (O is off) 2 <fmat: vector> - set fmat to fire outlets: 1 - output fmat or bang

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gbr.gen=		Generate waveform/function
		Adds a given (and parametrised) waveform/function to an incomming vector. The user can chose among various waveforms/functions
		arguments: <'cosine'|'sine': function> <list: parameters> - generator function and parameters ['cosine'] attributes: none messages: postdoc - post external doc to console set <'cosine'|'sine': function> <list: parameters> - set generator function and parameters inlets: 1 <fmat|fvec: vector> - input vector to which the waveform/function will be added 2 <list: parameters> - set generator parameters outlets: 1 <fmat|fvec: vector> - output incoming vector with added waveform/function

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gbr.harms		Estimate harmonics from a given spectrum (or any other vector)
		Estimates frequencies (interpolated and scaled indices) and amplitudes of harmonics in an incoming vector. Harmonics are defined as peaks around the multiple of a given value (fundamental frequency) with a given tolerance. The estimation of harmonics in a spectrum works best when a logarthimic amplitude spectrum is provided as input.
		arguments: 1 <num: max harms> - maximum number of harmonics to be estimated [16] 2 <num: freq> - fundamental frequency in Hz [10] 3 <num: factor> - allowed deviation factor from theoretic harmonic frequency (linear factor of f0) [1.0] attributes: none messages: postdoc - post external doc to console max <num: max harms> - set maximum number of harmonics to be estimated freq <num: freq> - set fundamental frequency in Hz delta <num: factor> - set allowed deviation factor from theoretic harmonic frequency (linear factor of f0) interval <num: cent> - set allowed deviation factor from theoretic harmonic frequency (in cent) height <num: amp> - set minimum height for harmonic peaks width <num: freq> - set maximum width for harmonic peaks inlets: 1 <fmat|fvec: vector> - input vector> outlets: 1 <fmat: vector> - vector of harmonics

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gbr.ifft		Inverse fast Fourier transform
		Calculates inverse FFT on incoming vector.
		arguments: 1 <num: size> - FFT size (rounded to the next power of 2) [512] attributes: scale <num: factor> - scaling factor (0 --> 1 / FFT size) [1] mode <'auto'|'complex'|'real': mode> - FFT mode ['auto'] out <fmat: output> - set output vector messages: postdoc - post external doc to console inlets: 1 - messages only outlets: 1 <fmat> - no description

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gbr.lifter		Cepstral liftering
		Cepstral liftering (HTK and Auditory Toolbox styles)
		arguments: 1 <num: size> - size of input vector [13] 2 <num: factor> - filtering factor [0] attributes: inv <bool: switch> - enable/disable the inverse liftering mode [0] mode <'exp'|'sin': mode> - set liftering type: exponential (Auditory Toolbox-like) or sinusoidal (HTK-like) ['exp'] out <fmat: output> - set output vector messages: postdoc - post external doc to console insize <num: size> - size of input vector factor <num: factor> - set filtering factor getstate - get internal weights matrix inlets: 1 <fmat|fvec: vector> - cepstrum vector outlets: 1 <fmat: vector> - liftered cepstrum 2 <fmat: weights> - internal weights matrix

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gbr.lpc		Linear prediction coefficients
		Calculates LPC coefficients from incoming sinal frame.
		arguments: 1 <num: order> - LPC order [12] attributes: errasfloat <bool: switch> - enable/disable float number output [off] out <fmat: output> - set output vector messages: postdoc - post external doc to console order <num: order> - set LPC order inlets: 1 <fmat|fvec: vector> - input vector outlets: 1 <fmat: vector> - LPC coefficients 2 <num|fmat: error> - prediciton error 3 <fmat: vector> - autocorrelation 4 <fmat: vector> - internal values

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gbr.mask		Partial masking using critical band width
		Calculates and applies masking to incoming vector of partials. The input format (attribute @format) determines the interpretation of the columns of the incoming matrix: 'fa' requires 2 columns with frequencies and amplitudes, 'ifa' requires 3 columns with partial indices, frequencies and amplitudes.
		arguments: none attributes: format - 'fa'|'ifa': input format> - set input matrix format ['fa'] out <fmat: output> - set output vector messages: postdoc - post external doc to console slope <num: slope> [<num: slope>] - set (left and right) masking slope calcpeaks <num: (left) peaks> [<num: right peaks>] - set number of peaks on the left and right to be taken into account in calculation inlets: 1 <fmat: partials> - vector of partials (in given format) outlets: 1 <fmat: partials> - vector of partials (in given format)

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gbr.morph		Partials sets interpolation
		Partials sets interpolation using indexes, frequencies and amplitudes
		arguments: 1 <fmat: partials> - vector of paritals corresponding to the interpolation factor 0 2 <fmat: partials> - vector of paritals corresponding to the interpolation factor 1 attributes: format - 'fa'|'ifa'|'plain': input format> - set input matrix format ['fa'] out <fmat: output> - set output vector messages: postdoc - post external doc to console inlets: 1 <num: factor> - morphing factor (0...1) 2 <fmat: partials> - vector of paritals corresponding to the interpolation factor 0 3 <fmat: partials> - vector of paritals corresponding to the interpolation factor 1 outlets: 1 <fmat: partials> - vector of morphed paritals

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gbr.ola~		Overlap-add
		Performs the overlap-add of incoming vectors into a forward delayline. The vector will be shortened at the end of the delayline.
		arguments: 1 <num: channels> - number of output channels [1] 2 <num: size> - buffer size [100] 3 <num: delay> - delay position [0] 4 <num: channel> - output channel (0 switches off) [1] attributes: interp <bool: switch> - enable/disable interpolation ['off'] unit <'msec'|'sec'|'samp': unit> - set time unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console clear - clear delay line inlets: 1 <fmat|fvec: vector> - overlap-add vector at given delay position 2 <num: delay> - set delay 3 <num: channel> - set output channel (0 switches off) outlets: 1 - sum delay line output

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gbr.paste		Paste a grain (fmat or fvec) into a drain
		Copies a vector into a drain with a given delay. The vector will be shortened at the end of the drain.
		arguments: 1 <delayline|fmat|fvec: destination> - destination (write delay line or fmat) 2 <num: delay> - delay position [0] attributes: interp <bool: switch> - enable/disable interpolation ['off'] unit <'msec'|'sec'|'samp': unit> - set time unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console set <delayline|fmat|fvec: destination> - set destination (write delay line, fmat or fvec) inlets: 1 <fmat|fvec: vector> - paste vector at given delay position 2 <num: delay> - set delay position outlets: none

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gbr.peaks		Estimate peaks (partials) from a given spectrum (or any other vector)
		Estimates frequencies (interpolated and scaled indices) and amplitudes of peaks in an incoming vector. The estimation of partials in a spectrum works best when a logarthimic amplitude spectrum (positive frequencies) is provided as input.
		arguments: 1 <num: max peaks> - maximum number of peaks to be estimated [16] attributes: domain <num: domain> - set domain of output peaks (<= 0 sets to sr/2) [sr/2] domscale <num: factor> - set scaling factor of output peaks (overwrites domain and down) down <num: down> - set down sampling factor of incoming frames (overwrites domain and domscale) [1] keep <'lowest'|'strongest': mode> - keep first or strongest peaks ['lowest'] range <min: boundary> <max: boundary> - band where to search for peaks messages: postdoc - post external doc to console max <num: max peaks> - set maximum number of peaks to be estimated height <num: amp> - set minimum height for peaks width <num: freq> - set maximum width for peaks (indicates sinuso�dality) dev <num: value> - set maximum deviation from mean value inlets: 1 <fmat|fvec: vector> - input vector (spectrum)> outlets: 1 <fmat: vector> - vector of peaks

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gbr.preemphasis		Simple first order difference filter
		Simple first order difference filter
		arguments: 1 <num: factor> - filtering factor [0] attributes: out <fmat: out> - set output vector messages: postdoc - post external doc to console factor <num: factor> - set filtering factor getstate - get the previous sample clear - clear any previous sample inlets: 1 <fmat|fvec: vector> - input signal outlets: 1 <fmat: vector> - output preemphasised frame 2 <fmat: vector> - previous frame

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gbr.psy~		Pysch synchronous (YIN-based) signal slicing
		Cuts incoming signal into elementary waveforms. Outputs vectors corresponding to two periods of the estimated frequency or fixed duration (256 points) when unvoiced.
		arguments: none attributes: active <bool: switch> - activate/deactivate calculation and output ['on'] threshold <num: pitch> [<num: noise>] - set pitch and noise quality treshold [0.6838 0.4523] messages: postdoc - post external doc to console inlets: 1 - input signal to be analysed and cut into elemetary waveforms outlets: 1 <fmat: vector> - elementary waveforms (2 periods) 2 <num: freq> - estimated frequency in Hz (0, when unvoiced) 3 <num: periodicity> - yin periodicity/quality factor 4 <num: factor> (linear) energy

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gbr.resample		Resampling
		Resamples incoming vector in different modes: 'cubic' (cubic interpolation), 'downmean' (downsampling by calculating the mean of a given number of values), 'downremove' (picks nearest value)
		arguments: 1 <num: order> - resampling order/increment [1] attributes: mode <'cubic'|'downmean'|'downremove': mode> - set resampling mode out <fmat: output> - set output vector messages: postdoc - post external doc to console inlets: 1 <fmat: vector> - input vector 2 <num: order> - set resampling order/increment outlets: 1 <fmat: vector> - output vector

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gbr.schedule~		Delay/scheduler respecting Gabor timing
		Schedules matrices or bangs with given delay time.
		arguments: <num: delay> - delay time [0] attributes: unit <'msec'|'sec'|'samp'|'hz'|'midi'|'midicent': unit> - set delay unit to msec, samples, etc ['msec'] delay <num: delay> - set delay [0] out <fmat: out> - set output fmat messages: postdoc - post external doc to console bang - input bang stop - stop scheduled events inlets: 1 <fmat: vector> - delay fmat 2 <num: delay> - set delay outlets: 1 - output fmat or bang

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gbr.slice~		Signal slicing
		Cuts incoming signal into frames of given size with given period (hop size).
		arguments: 1 <num: size> - frame size [512] 2 <num: size> - hop size [256] attributes: size <num: size> - set frame size period <num: size> - set hop size active <bool: switch> - activate/deactivate calculation and output ['on'] unit <'samp'|'msec'|'sec': unit> - set time unit to msecs, secs or samples ['samp'] messages: postdoc - post external doc to console inlets: 1 - input signal to be sliced into frames outlets: 1 <fmat: vector> - signal frames 2 <undefined> - no description

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gbr.tapin~		Input tap for write delay line
		Simple input tap for write delay line defined by gbr.dline~.
		arguments: 1 <delayline: write> - delay line (defined by gbr.drain~) 2 <num: delay> - delay time (in given unit) [0] attributes: unit <'msec'|'sec'|'samp': unit> - set delay unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console set <delayline: write> - set delay line (defined by gbr.drain~) inlets: 1 - input signal written to delay line 2 - set delay time outlets: 1 - signal outputundefined

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gbr.tapout~		Output tap for read delay line
		Simple output tap for read delay line defined by gbr.drain~.
		arguments: 1 <delayline: read> - delay line (defined by gbr.dline~) 2 - delay time (in given unit) [0] attributes: interp - 0|1|'off'|'on|'cubic'|'linear': mode> - interpolation mode ['off'] unit <'msec'|'sec'|'samp': unit> - set delay unit to msecs, secs or samples ['msec'] messages: postdoc - post external doc to console set <delayline: read> - set delay line (defined by gbr.dline~) inlets: 1 - messages only 2 <sig|num: delay> - delay time outlets: 1 - delayed signal

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gbr.timer~		Gabor timer
		stop watch in Gabor scheduling scheme
		arguments: none attributes: unit <'msec'|'sec'|'samp'|'hz'|: unit> - set timer unit to msecs, secs, samples or Hz ['msec'] messages: postdoc - post external doc to console bang - report time since last bang inlets: 1 - messages only outlets: 1 <num: time> - time in given unit

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gbr.trace		Trace and index peaks
		Trace peaks from frame to frame to associate indexes to the peaks
		arguments: 1 <num: max> - maximum number of peaks [200] attributes: max <num: max> - maximum number of partials [200] relfreq <num: var> - allowed relative frequency variation for a peak to keep its index in cent > 0. (default: 20.) absfreq <num: var> - allowed frequency variation for a peak to keep its index in Hz > 0. (default: 50.) absamp <num: var> - allowed linear amplitude variation for a peak to keep its index > 0. (default: 0.5) maxpasses <num: max> - maximum number of connection passes for the algorithm (default 4) messages: postdoc - post external doc to console clear - reset (indexes start from 0, drops previous peaks set) inlets: 1 <fmat: partials> - vector of partials outlets: 1 <fmat: partials> - vector of traced partials (with index)

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gbr.wind=		Apply a window to an incoming frame, grain or wave
		Applies a chosen (and parametrized) window to the incomming fmat (column by column). The user can chose among various window types (see help patch).
		arguments: <sym: function> <list: parameters> - window function and parameters ['hann'] attributes: none messages: postdoc - post external doc to console set <sym: function> <list: parameters> - set window function and parameters inlets: 1 <fmat|fvec: vector> - input vector to be windowed 2 <list: parameters> - set window parameters outlets: 1 <fmat|fvec: vector> - output incoming vector with applied window

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gbr.yin		Fundamental frequency estimation after de Cheveigne and Kawahara
		Estimates fundamental frequency and outputs energy, periodicity factor, and auto correlation coefficients.
		arguments: 1 <num: min freq> - lowest estimated frequency in Hz [50.] 2 - quality/periodicity threshold [0.68] attributes: minfreq <num: min freq> - lowest estimated frequency in Hz threshold <num: threshold> - quality/periodicity threshold down <num: factor> - down sampling factor of incoming frames [1] messages: postdoc - post external doc to console inlets: 1 - signal frame (fmat or fvec outlets: 1 <num: freq> - estimated frequency in Hz 2 <num: energy> - energy factor 3 <num: perodicity> - quality/periodicity factor 4 <num: ac1> - 2nd autocorrelation coefficient (ac1) 5 <fmat: acf> - vector of autocorrelation coefficients