Difference between revisions of "Gabor Modules"

Latest revision as of 23:21, 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~ ... Pitch 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

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

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

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

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

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

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

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

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

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)

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

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

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

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

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

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

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

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

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)

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

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

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

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

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

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

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

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

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

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

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

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

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)

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

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

@@ Line 22: / Line 22: @@
 * 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.psy~ ... Pitch 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
@@ Line 310: / Line 311: @@
 {{Module |
    | name=gbr.schedule~
-   | brief=Gabor timing impulse generator
+   | brief=Delay/scheduler respecting Gabor timing
-   | descr=Periodically outputs a given fmat or a bang within the Gabor scheduling scheme.
+   | descr=Schedules matrices or bangs with given delay time.
    | arguments=<num: delay> - delay time [0]<br>
    | attributes=unit <&#039;msec&#039;&#124;&#039;sec&#039;&#124;&#039;samp&#039;&#124;&#039;hz&#039;&#124;&#039;midi&#039;&#124;&#039;midicent&#039;: unit> - set delay unit to msec, samples, etc [&#039;msec&#039;]<br>delay <num: delay> - set delay [0]<br>out <fmat: out> - set output fmat<br>

Difference between revisions of "Gabor Modules"

Views

Latest revision as of 23:21, 3 May 2009

Navigation menu

IMTR

Search

Tools

Personal tools