[Sv1-devel] Antw: What is the data being exported?

[Rainer J. S. <Rai...@mo...>]

Hi Paul,

"Export Audio to Data File" does not save the Spectogram or another analysis, but the original audio data. I'm not sure for whom this feature was created as it results in very, very big text files with exactly the same information as in the previously loaded binary .wav file (but if you export ca. 1 sec., import it in Excel and make a line chart there, you can see the waveform).

Depending on your needs you could be happy with File | Export SVG File... (as SVG contains vector information in plain text). I do not know a way to save the data from SV's FFT analysis ("Export Annotation Layer" does not seem to be implemented for Spectogram Layers/Panes). As SV and most Vamp Plugins are open source, you could implement something for this purpose or read the fft data from the .sv file.

But if you want to re-use FFT data in mathematical/statistic software like R(Studio), it is easier to calculate it directly there; e.g. for R[Studio] you could use the packages tuneR and signal, have a look at https://hansenjohnson.org/post/spectrograms-in-r/ (it's for analyzing whales, but works with Wagner and The Who too).

Best regards,
Rainer

>>> Paul Chen <che...@gm...> 29.11.2019 02:36 >>>
Hi folks,

I'm new to this project and excited to learn about what it does. One quick question - what is the csv data exported by:

File -> Export Audio to Data File

I wanted to export peak frequency spectogram but it doesn't look like it.

Thanks for comments

Paul