The signal to be analyzed.
The initial value of the freq output, until the first
valid pitch is found.
The minimum frequency in Hertz to be considered for reporting.
The maximum frequency in Hertz to be considered for reporting.
The frequency at which the pitch is estimated. This will
be automatically clipped to be between minFreq and
maxFreq.
A value which guides the search for the peak frequency in the first coarse step. Its setting does *not* affect the final pitch resolution; setting it larger will cause the coarse search to take longer, and setting it smaller will cause the fine search to take longer.
This specifies the length of a median filter applied to
the frequency output estimation. With the default value
of 1 the filter is defeated. Median filtering can help
eliminating single spikes and jitter. This will however
add latency to the output.
The minimum amplitude threshold above which the pitch follower operates. An input signal below this threshold is not analyzed.
This is a threshold used to find the first peak in the
autocorrelation signal which gives the reported
frequency. It is a factor of the energy of the signal
(autocorrelation coefficient at zero). Set this value
higher (e.g. to 1) to eliminate false frequencies
corresponding to overtones.
An integer factor by which the input signal is down
sampled to reduce CPU overhead. This will also reduce
the pitch resolution. The default value of 1 means
that the input signal is not down sampled.
If the clarity argument is greater than zero (it is
zero by default) then the hasFreq output is given
additional detail. Rather than simply being 1 when a
pitch is detected, it is a "clarity" measure in the
range between zero and one. (Technically, it's the
height of the autocorrelation peak normalised by the
height of the zero-lag peak.) It therefore gives a kind
of measure of "purity" of the pitched signal.
The minimum amplitude threshold above which the pitch follower operates.
The minimum amplitude threshold above which the pitch follower operates. An input signal below this threshold is not analyzed.
A value which guides the search for the peak frequency in the first coarse step.
A value which guides the search for the peak frequency in the first coarse step. Its setting does *not* affect the final pitch resolution; setting it larger will cause the coarse search to take longer, and setting it smaller will cause the fine search to take longer.
If the clarity argument is greater than zero (it is
zero by default) then the hasFreq output is given
additional detail.
If the clarity argument is greater than zero (it is
zero by default) then the hasFreq output is given
additional detail. Rather than simply being 1 when a
pitch is detected, it is a "clarity" measure in the
range between zero and one. (Technically, it's the
height of the autocorrelation peak normalised by the
height of the zero-lag peak.) It therefore gives a kind
of measure of "purity" of the pitched signal.
An integer factor by which the input signal is down sampled to reduce CPU overhead.
An integer factor by which the input signal is down
sampled to reduce CPU overhead. This will also reduce
the pitch resolution. The default value of 1 means
that the input signal is not down sampled.
The frequency at which the pitch is estimated.
The frequency at which the pitch is estimated. This will
be automatically clipped to be between minFreq and
maxFreq.
The signal to be analyzed.
The initial value of the freq output, until the first
valid pitch is found.
The maximum frequency in Hertz to be considered for reporting.
This specifies the length of a median filter applied to the frequency output estimation.
This specifies the length of a median filter applied to
the frequency output estimation. With the default value
of 1 the filter is defeated. Median filtering can help
eliminating single spikes and jitter. This will however
add latency to the output.
The minimum frequency in Hertz to be considered for reporting.
This is a threshold used to find the first peak in the autocorrelation signal which gives the reported frequency.
This is a threshold used to find the first peak in the
autocorrelation signal which gives the reported
frequency. It is a factor of the energy of the signal
(autocorrelation coefficient at zero). Set this value
higher (e.g. to 1) to eliminate false frequencies
corresponding to overtones.
An autocorrelation based pitch following UGen. It is more accurate than
ZeroCrossing, but more also more CPU costly. For most purposes the default settings can be used and onlyinneeds to be supplied.The UGen has two outputs: The first output is the frequency estimate in Hertz, the second output is a toggle
hasFreq, which tells whether a pitch was found (1) or not (0). If theclarifyargument is used,hasFreqhas more fine grained information.The pitch follower executes periodically at the rate specified by
execFreqin cps. First it detects whether the input peak to peak amplitude is above theampThresh. If it is not then no pitch estimation is performed, thehasFreqoutput is set to zero and thefreqoutput is held at its previous value. Otherwise, the autocorrelation is calculated, and the first peak after the peak around the lag of zero that is abovepeakThreshtimes the amplitude of the peak at lag zero is reported.The signal to be analyzed.
The initial value of the
freqoutput, until the first valid pitch is found.The minimum frequency in Hertz to be considered for reporting.
The maximum frequency in Hertz to be considered for reporting.
The frequency at which the pitch is estimated. This will be automatically clipped to be between
minFreqandmaxFreq.A value which guides the search for the peak frequency in the first coarse step. Its setting does *not* affect the final pitch resolution; setting it larger will cause the coarse search to take longer, and setting it smaller will cause the fine search to take longer.
This specifies the length of a median filter applied to the frequency output estimation. With the default value of
1the filter is defeated. Median filtering can help eliminating single spikes and jitter. This will however add latency to the output.The minimum amplitude threshold above which the pitch follower operates. An input signal below this threshold is not analyzed.
This is a threshold used to find the first peak in the autocorrelation signal which gives the reported frequency. It is a factor of the energy of the signal (autocorrelation coefficient at zero). Set this value higher (e.g. to
1) to eliminate false frequencies corresponding to overtones.An integer factor by which the input signal is down sampled to reduce CPU overhead. This will also reduce the pitch resolution. The default value of
1means that the input signal is not down sampled.If the
clarityargument is greater than zero (it is zero by default) then thehasFreqoutput is given additional detail. Rather than simply being 1 when a pitch is detected, it is a "clarity" measure in the range between zero and one. (Technically, it's the height of the autocorrelation peak normalised by the height of the zero-lag peak.) It therefore gives a kind of measure of "purity" of the pitched signal.