soundgen:::formatPitchManual(c(NA, 120, 180, NA))
soundgen:::formatPitchManual('NA, 120, 180, NA')
soundgen:::formatPitchManual(list(
'myfile.wav' = list(pitch = c(NA, 120, 180, NA))
))
soundgen:::formatPitchManual(data.frame(file = c('file1.wav', 'file2.wav'),
pitch = c('NA, 120', '180, NA')))
soundgen:::formatPitchManual('adja')
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