pitchSmoothPraat: Pitch smoothing as in Praat

In soundgen: Sound Synthesis and Acoustic Analysis

Pitch smoothing as in Praat

Description

Smoothes an intonation (pitch) contour with a low-pass filter, as in Praat (http://www.fon.hum.uva.nl/praat/). Algorithm: interpolates missing values (unvoiced frames), performs FFT to obtain the spectrum, multiplies by a Gaussian filter, performs an inverse FFT, and fills the missing values back in. The bandwidth parameter is about half the cutoff frequency (ie some frequencies will still be present up to ~2 * bandwidth)

Usage

pitchSmoothPraat(pitch, bandwidth, samplingRate, plot = FALSE)

Arguments

pitch	numeric vector of pitch values (NA = unvoiced)
bandwidth	the bandwidth of low-pass filter, Hz (high = less smoothing, close to zero = more smoothing)
samplingRate	the number of pitch values per second
plot	if TRUE, plots the original and smoothed pitch contours

See Also

analyze

Examples

pitch = c(NA, NA, 405, 441, 459, 459, 460, 462, 462, 458, 458, 445, 458, 451,
444, 444, 430, 416, 409, 403, 403, 389, 375, NA, NA, NA, NA, NA, NA, NA, NA,
NA, 183, 677, 677, 846, 883, 886, 924, 938, 883, 946, 846, 911, 826, 826,
788, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 307,
307, 368, 377, 383, 383, 383, 380, 377, 377, 377, 374, 374, 375, 375, 375,
375, 368, 371, 374, 375, 361, 375, 389, 375, 375, 375, 375, 375, 314, 169,
NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, NA, 238, 285, 361, 374, 375, 375,
375, 375, 375, 389, 403, 389, 389, 375, 375, 389, 375, 348, 361, 375, 348,
348, 361, 348, 342, 361, 361, 361, 365, 365, 361, 966, 966, 966, 959, 959,
946, 1021, 1021, 1026, 1086, 1131, 1131, 1146, 1130, 1172, 1240, 1172, 1117,
1103, 1026, 1026, 966, 919, 946, 882, 832, NA, NA, NA, NA, NA, NA, NA, NA,
NA, NA)
pitchSmoothPraat(pitch, bandwidth = 10, samplingRate = 40, plot = TRUE)
pitchSmoothPraat(pitch, bandwidth = 2, samplingRate = 40, plot = TRUE)

soundgen documentation built on Sept. 12, 2024, 6:29 a.m.