dot-ssm: SSM per sound
In soundgen: Sound Synthesis and Acoustic Analysis

.ssm	R Documentation

SSM per sound

Description

Internal soundgen function.

Usage

.ssm(
  audio,
  windowLength = 25,
  step = 5,
  overlap = NULL,
  win = 1,
  sparse = FALSE,
  maxFreq = NULL,
  nBands = NULL,
  MFCC = 2:13,
  input = c("mfcc", "melspec", "spectrum")[2],
  norm = FALSE,
  simil = c("cosine", "cor")[1],
  kernelLen = 100,
  kernelSD = 0.5,
  padWith = 0,
  plot = TRUE,
  main = NULL,
  heights = c(2, 1),
  width = 900,
  height = 500,
  units = "px",
  res = NA,
  specPars = list(levels = seq(0, 1, length = 30), colorTheme = c("bw", "seewave",
    "heat.colors", "...")[2], xlab = "Time, s", ylab = "kHz"),
  ssmPars = list(levels = seq(0, 1, length = 30), colorTheme = c("bw", "seewave",
    "heat.colors", "...")[2], xlab = "Time, s", ylab = "Time, s"),
  noveltyPars = list(type = "b", pch = 16, col = "black", lwd = 3)
)

Arguments

`audio`	a list returned by `readAudio`
`windowLength`	length of FFT window, ms
`step`	you can override `overlap` by specifying FFT step, ms (NB: because digital audio is sampled at discrete time intervals of 1/samplingRate, the actual step and thus the time stamps of STFT frames may be slightly different, eg 24.98866 instead of 25.0 ms)
`overlap`	overlap between successive FFT frames, %
`sparse`	if TRUE, the entire SSM is not calculated, but only the central region needed to extract the novelty contour (speeds up the processing)
`maxFreq`	highest band edge of mel filters, Hz. Defaults to `samplingRate / 2`. See `melfcc`
`nBands`	number of warped spectral bands to use. Defaults to `100 * windowLength / 20`. See `melfcc`
`MFCC`	which mel-frequency cepstral coefficients to use; defaults to `2:13`
`input`	the spectral representation used to calculate the SSM
`norm`	if TRUE, the spectrum of each STFT frame is normalized
`simil`	method for comparing frames: "cosine" = cosine similarity, "cor" = Pearson's correlation
`kernelLen`	length of checkerboard kernel for calculating novelty, ms (larger values favor global, slow vs. local, fast novelty)
`kernelSD`	SD of checkerboard kernel for calculating novelty
`padWith`	how to treat edges when calculating novelty: NA = treat sound before and after the recording as unknown, 0 = treat it as silence
`plot`	if TRUE, plots the SSM
`main`	plot title
`heights`	relative sizes of the SSM and spectrogram/novelty plot
`width`, `height`, `units`, `res`	graphical parameters for saving plots passed to `png`
`specPars`	graphical parameters passed to `filled.contour.mod` and affecting the `spectrogram`
`ssmPars`	graphical parameters passed to `filled.contour.mod` and affecting the plot of SSM
`noveltyPars`	graphical parameters passed to `lines` and affecting the novelty contour