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

[Paul C. <che...@gm...>]

Good points! Glad to learn about the history of this great project.

I break up the sounds sampled from a metronome. Each sound wave within that
time period is not big so I can extract peak frequencies of each sample
using the spectrum UI. From them I can analyze the music notes being played
from each sample sound. All are done manually. So I'm hoping to find a way
to automate the manual steps. Now it looks like I need to hack the code to
make that happen?

Thanks for comments


On Thu, Dec 5, 2019 at 2:43 AM Chris Cannam <ca...@al...>
wrote:

> Hi Paul, Rainer -
>
> On Fri, 29 Nov 2019, at 15:25, Rainer Josef SCHWOB wrote:
> > "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).
>
> As your example suggests, it's mostly useful for exporting very short
> selections for analysis in some non-audio tool, rather than exporting the
> whole of a long audio file.
>
> There is currently no way to export the contents of a spectrogram layer.
> Depending on the type of spectrogram, you may be able to run it in a plugin
> and then export the contents of the 3d plot layer that shows the plugin
> output.
>
> This is undoubtedly a feature that ought to be there. There are a couple
> of reasons why it wasn't added at the same time as exporting other kinds of
> layer.
>
> One is tediously technical - the export function exports whatever internal
> model the layer is formally a view of, but the spectrogram layer is
> formally another view of the waveform data (it just uses another model for
> conversion internally) so a naive implementation would end up exporting
> time-domain data rather than spectrograms!
>
> Another line of thought was just that spectrogram data may be rather large
> to be exported as text. But that was before the ability to export plain
> audio as text was added, and that's of a similar size. And of course any
> plugin can produce equally bulky output that can be exported.
>
>
> Chris
>
>
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