getVocalFry | R Documentation |
Internal soundgen function.
getVocalFry(
rolloff,
pitch_per_gc,
subRatio = 2,
subFreq = 0,
subDep = 10,
subWidth = 10000,
dynamicRange = 80,
shortestEpoch = 300
)
rolloff |
matrix of original amplitudes of each harmonic in f0 stack
returned by |
pitch_per_gc |
vector of the same length as ncol(rolloff)): f0 in Hz, one value per glottal cycle |
subRatio |
a positive integer giving the ratio of f0 (the main fundamental) to g0 (a lower frequency): 1 = no subharmonics, 2 = period doubling regardless of pitch changes, 3 = period tripling, etc; subRatio overrides subFreq (anchor format) |
subFreq |
instead of a specific number of subharmonics (subRatio), we can specify the approximate g0 frequency (Hz), which is used only if subRatio = 1 and is adjusted to f0 so f0/g0 is always an integer (anchor format) |
subDep |
the depth of subharmonics relative to the main frequency component (f0), %. 0: no subharmonics; 100: g0 harmonics are as strong as the nearest f0 harmonic (anchor format) |
subWidth |
Width of subharmonic sidebands - regulates how rapidly g-harmonics weaken away from f-harmonics: large values like the default 10000 means that all g0 harmonics are equally strong (anchor format) |
dynamicRange |
dynamic range, dB. Harmonics and noise more than dynamicRange under maximum amplitude are discarded to save computational resources |
shortestEpoch |
minimum duration of each epoch with unchanging subharmonics regime or formant locking, in ms |
Adds subharmonics to the main (f0) harmonic stack, forming sidebands.
Returns a list consisting of a list of rolloff matrices (one matrix per epoch) and a dataframe of epochs.
pitch_per_gc = c(400, 500, 600, 700)
rolloff = getRolloff(pitch_per_gc, rolloff = -30)
# one epoch, two subharmonics
rolloff_subh = soundgen:::getVocalFry(rolloff, pitch_per_gc,
subFreq = 200, subDep = 150, shortestEpoch = 100)
# three epochs with 2/3/4 subharmonics
rolloff_subh = soundgen:::getVocalFry(rolloff, pitch_per_gc,
subFreq = 200, subDep = 150, shortestEpoch = 0)
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