fo | R Documentation |
Applies Schäefer-Vincent periodicity analysis \insertCiteSchäfer-Vincent.1983.10.1159/000261691superassp
to find fo (in Hz)
along signals listed in listOfFiles
. Input signals not in a file format natively
supported will be converted before the autocorrelation functions are
computed. The conversion process will display warnings about input files
that are not in known losslessly encoded formats.
fo(
listOfFiles = NULL,
beginTime = 0,
endTime = 0,
windowShift = 5,
gender = "u",
maxF = 600,
minF = 50,
minAmp = 50,
maxZCR = 3000,
toFile = TRUE,
explicitExt = "fo",
outputDirectory = NULL,
assertLossless = NULL,
logToFile = FALSE,
convertOverwrites = FALSE,
keepConverted = FALSE,
verbose = TRUE
)
listOfFiles |
vector of file paths to be processed by function |
beginTime |
the time point (in seconds) of the start of the analysed
interval. A NULL or 0 is interpreted as the start of the signal file.
If a vector of time points is supplied, the length of that vector needs
to correspond with the length of |
endTime |
the time point (in seconds) of the end of the analysed
interval. A NULL or 0 is interpreted as the end of the signal file.
If a vector of time points is supplied, the length of that vector needs
to correspond with the length of |
windowShift |
the amount of time (in ms) that the analysis window will be shifted between analysis frames |
gender |
= |
maxF |
= |
minF |
= |
minAmp |
= |
maxZCR |
maximum zero crossing rate in Hz (for voicing detection) |
toFile |
Should the function write the results to a file, with the
(default) file extension ( |
explicitExt |
the file extension will be used when
result files are written ( |
outputDirectory |
directory in which output files are stored. Defaults to NULL which means that the result file will be stored in the same directory as the input file. |
assertLossless |
an optional list of file extensions that the user wants to assert contains losslessly encoded signals data. |
logToFile |
whether to log commands to a separate logfile in the
|
verbose |
display verbose information about processing steps taken, as well as progress bars. |
The results will be will be written to an SSFF formated file with the base name of the input file and extension .fo in a track foHz.
The function is a re-write of the wrassp::ksvF0 function, but with media pre-conversion, better checking of preconditions such as the input file existance, structured logging, and the use of a more modern framework for user feedback.
Optionally, location and type of the signal extrema on
which the fo data are based, may be stored in a label
file. The name of this file will consist of the basename of the .fo
file and the extension '.prd'.
The native file type of this function is "wav" files (in "pcm_s16le" format), SUNs "au", NIST, or CSL formats (kay or NSP extension). Input signal conversion, when needed, is done by libavcodec and the excellent av::av_audio_convert wrapper function
The number of successfully written files (if toFile=TRUE
), or a vector of AsspDataObj
objects (if toFile=FALSE
).
This function is not considered computationally expensive enough to require caching of results if applied to many signals. However, if the number of signals it will be applied to is very long, then caching of results may be warranted.
Raphael Winkelmann
Lasse Bombien
Fredrik Nylén
pitch
for a tracker of pitch
# get path to audio file
path2wav <- list.files(system.file("samples","sustained", package = "superassp"), pattern = glob2rx("a1.wav"), full.names = TRUE)
# calculate fundamental frequency contour
res <- ksvfo(path2wav, toFile=FALSE)
# plot the fundamental frequency contour
plot(seq(0,numRecs.AsspDataObj(res) - 1) / rate.AsspDataObj(res) +
attr(res, 'startTime'),
res[["fo[Hz]"]],
type='l',
xlab='time (s)',
ylab=expression(paste(f[o]," frequency (Hz)")))
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