Pitch tracking via Praat's subharmonic summation (SHS) method

Tracks fundamental frequency (F0) using Praat's subharmonic summation (SHS) algorithm via pladdrr. SHS works in the frequency domain by summing subharmonically compressed spectral representations and is robust to spectral-domain interference; prefer it over AC/CC for speech with strong vocal fry or very low F0.

Usage

trk_pitch_shs(
  listOfFiles,
  beginTime = 0,
  endTime = 0,
  time_step = 0.01,
  minimum_f0 = 50,
  maximum_f0 = 500,
  maximum_frequency_components = 1250,
  maximum_number_of_subharmonics = 15,
  number_of_candidates = 15,
  compression_factor = 0.84,
  number_of_points_per_octave = 48,
  windowShape = "Gaussian1",
  relativeWidth = 1,
  toFile = FALSE,
  explicitExt = "psh",
  outputDirectory = NULL,
  verbose = TRUE
)

Arguments

listOfFiles

Character vector of audio file paths. Any format supported by av is accepted; non-native inputs are transcoded automatically.

beginTime

Numeric. Start of analysis window in seconds. Default 0 (file start).

endTime

Numeric. End of analysis window in seconds. Default 0 (file end).

time_step

Numeric. Frame shift in seconds; sets output frame rate (1 / time_step Hz). Default 0.01 s (100 Hz).

minimum_f0

Numeric. Lower F0 bound in Hz. Default 50 Hz.

maximum_f0

Numeric. Upper F0 bound (ceiling) in Hz. Default 500 Hz.

maximum_frequency_components

Numeric. Highest frequency included in the spectral analysis in Hz. Default 1250 Hz.

maximum_number_of_subharmonics

Integer. Maximum number of subharmonic levels to sum. Default 15.

number_of_candidates

Integer. Maximum pitch candidates per frame. Default 15.

compression_factor

Numeric. Spectral compression factor applied during subharmonic summation. Default 0.84.

number_of_points_per_octave

Integer. Spectral resolution in the log-frequency representation (points per octave). Default 48.

windowShape

Character. Window shape applied to audio before loading. Default "Gaussian1".

relativeWidth

Numeric. Relative width of the window. Default 1.0.

toFile

Logical. If TRUE, write SSFF output files and return the count written (invisibly). If FALSE, return an AsspDataObj. Default FALSE.

explicitExt

Character. Output file extension. Default "psh".

outputDirectory

Character. Directory for output files. NULL (default) writes alongside the input file.

verbose

Logical. Print per-file progress. Default TRUE.

Value

If toFile = FALSE: an AsspDataObj with track:

F0

REAL32, Hz, n_frames x 1. Fundamental frequency. 0 encodes unvoiced frames.

Frame rate: 1 / time_step Hz (default 100 Hz). If toFile = TRUE: integer count of files written, returned invisibly.

See also

trk_pitch_cc, trk_pitch_ac, trk_pitch_spinet

Examples

if (FALSE) { # \dontrun{
trk_pitch_shs(
  system.file("samples", "sustained", "a1.wav", package = "superassp"),
  toFile = FALSE
)
} # }