error message

[Claudina Solaro]

I am trying to run this sentence:

Q(spec(sound3, dB="max0", plot=FALSE))

But I get these error and warning messages:

Error in seq.default(range[1], range[2], length.out = n0) : 'to' must be a finite number In addition: Warning message: In (0:(n - 1)) * f : NAs produced by integer overflow

Can anybody help me?

Thank you!!

[Jérôme SUEUR]

Hello Claudina,

Can you send me off list or on a wetransfer like system your sound input?

Thanks 

Best

Jerome

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De: "Claudina Solaro" <claudin...@gmail.com>
À: "seewave GROUP" <see...@googlegroups.com>
Envoyé: Lundi 9 Octobre 2023 15:39:02
Objet: [seewave] error message

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[Claudina Solaro]

Hello Jerome.

Thank you very much for your answer!

Yes of course, no problem. I am sending you the sound in the attached file.

Thank you for your help!

Best regards

Claudina

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[Jérôme SUEUR]

Thank you for the file.

There are different issues

(1) you compute the spectrum for a complete file with 471249 samples to that the fft is quite long (235624 samples) and produces some NA (I don't know why actually). This cannot not be handled by Q()

(2) Q() looks for the dominant frequency of the spectrum which is, in this case, a complete spectrum quite noisy. It is then better to use a smoothed spectrum, something you can obtain with meanspec()

(3) there is low frequency aircraft noise, you need to filter it, see fir()

(4) you should do the analysis syllable by syllable to get a Q value per syllable. The silence between the syllables can bias the results and the syllables do not all have the same dominant frequency. 

library(tuneR)

library(seewave)

s <- readWave("Canto 3.wav")

s.fir <- fir(s, from=1000, bandpass=TRUE, output="Wave")

# for syllable 1, time start and end approximately estimated

Q(meanspec(s, dB="max0", from=0.38, to=0.78, plot=FALSE))

HTH

Jerome

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De: "Claudina Solaro" <claudin...@gmail.com>
À: "seewave GROUP" <see...@googlegroups.com>

Envoyé: Mercredi 11 Octobre 2023 14:36:14
Objet: Re: [seewave] error message

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