wrassp (version 0.1.2)

acfana: acfana

Description

acfana function adapted from libassp

Usage

acfana(listOfFiles = NULL, optLogFilePath = NULL, beginTime = 0,
  centerTime = FALSE, endTime = 0, windowShift = 5, windowSize = 20,
  effectiveLength = TRUE, window = "BLACKMAN", analysisOrder = 0,
  energyNormalization = FALSE, lengthNormalization = FALSE, toFile = TRUE,
  explicitExt = NULL, outputDirectory = NULL,
  forceToLog = useWrasspLogger)

Arguments

listOfFiles

vector of file paths to be processed by function

optLogFilePath

path to option log file

beginTime

= : set begin of analysis interval to seconds (default: 0 = beginning of file)

centerTime

= : set single-frame analysis with the analysis window centred at seconds; overrules BeginTime, EndTime and WindowShift options

endTime

= : set end of analysis interval to seconds (default: 0 = end of file)

windowShift

= : set analysis window shift to ms (default: 5.0)

windowSize

= : set analysis window size to ms; overrules EffectiveLength parameter

effectiveLength

make window size effective rather than exact

window

= : set analysis window function to (default: BLACKMAN)

analysisOrder

= : set analysis order to (default: 0 = sample rate in kHz + 3)

energyNormalization

calculate energy-normalized autocorrelation

lengthNormalization

calculate length-normalized autocorrelation

toFile

write results to file (default extension is .acf)

explicitExt

set if you wish to overwride the default extension

outputDirectory

directory in which output files are stored. Defaults to NULL, i.e. the directory of the input files

forceToLog

is set by the global package variable useWrasspLogger. This is set to FALSE by default and should be set to TRUE is logging is desired.

Value

• nrOfProcessedFiles or if only one file to process return AsspDataObj of that file

Details

Analysis of short-term autocorrelation function of the signals in . Analysis results will be written to a file with the base name of the input file and extension '.acf'. Default output is in SSFF binary format (track 'acf').

Examples

# get path to audio file
path2wav <- list.files(system.file("extdata", package = "wrassp"),
                       pattern = glob2rx("*.wav"),
                       full.names = TRUE)[1]

# calculate short-term autocorrelation
res <- acfana(path2wav, toFile=FALSE)

# plot short-term autocorrelation values
matplot(seq(0,numRecs.AsspDataObj(res) - 1) / rate.AsspDataObj(res) +
        attr(res, 'startTime'),
        res$acf,
        type='l',
        xlab='time (s)',
        ylab='short-term autocorrelation values')