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What software programs exist that can be used to calculate sound levels for long-durations of continuous audio files?

A helpful list of other sound processing programs was shared recently: https://bioacoustics.stackexchange.com/a/136/112, but only Triton is listed for calculating long-term spectral averages. MANTA is a similar tool for processing lots of continuous data.

I am interested in both stand-alone and/or programs that need to be run through Matlab/R/etc, but it's important for me to be able to export the LTSA product as an array or similar for further processing.

Thanks!

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The free and open source software, PAMGuard, has an option for an LTSA module to be run while you're processing your acoustic data. This is stored in binary files which can be accessed using either:

  • R (via the Pamguard R library, PamBinaries by Taiki San), or
  • Matlab (via the PAMGuard Matlab library, pgmatlab).

Once in either of these suites, you can handle the data and plot as you wish.

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I have been using this code posted in Github from tryan, which is written in Python, to build some LTSAs. It is basically Triton's algorithm but in Python. Since it is an open source code you can maybe change the algorithm to output the product you want. I was wondering if it would not be useful for you, since the resulting output of the LTSA is an image, converting the LTSA images into numpy arrays in Python. It might be a very naive step but depending on what you need it could be useful.

This repository also has the the relevant Matlab/Octave code.

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    $\begingroup$ Great to share your own code! Super helpful. If you wouldn't mind, could you add that it is a github link that you are sharing, and your github username so folks could find it again if the link breaks? $\endgroup$
    – etgriffiths
    Commented Jul 6, 2022 at 11:14
  • $\begingroup$ Thanks for the tip! I am a new stack user and still learning how it works. I just edited the answer so the information is more clear now and with the github source. $\endgroup$
    – Guilherme Frainer
    Commented Jul 19, 2022 at 11:55
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DetEdit has functionality to calculate LTSAs; it's a GUI but the code is written in MATLAB (open-source, relies on mkLtsa function mostly).

Article describing it: https://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1007598

Code/instructions/wiki: https://github.com/MarineBioAcousticsRC/DetEdit

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I have not personally used the below linked code, but I did have this starred in my GitHub folder a while back and had been meaning to try it. It may provide the type of output you can work with more easily, compared to Triton.

https://github.com/schonkopf/long-term-spectrogram

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