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Re: text spectrograms?

Subject: Re: text spectrograms?
From: "Peter Shute" pshute2
Date: Wed Jun 11, 2014 1:33 pm ((PDT))
Do you need the full spectrogram dumped? Audacity can dump a single slice o=
f it using the Plot Spectrum command in the Analyze menu.

You select a section of your recording (up to several minutes, I think) the=
n run that command. You can enter the usual spectrum parameters to view a g=
raph of the (average?) spectrum over the selection. There is an Export butt=
on to dump the values, in two tab separated columns - frequency and level.

These are listed to 6 decimal places, so you might want to load them into a=
 spreadsheet to reformat them. I don't know what would work best for a blin=
d person. I assume you'll either read them with some kind of Braille text t=
o speech device?

It might be possible to find a program that can do several slices at once a=
nd include a time column as well.

Here's a sample of Audacity's output. I've included the first and last 6 ro=
ws of data:

Frequency (Hz)  Level (dB)
Message: 21.
Subject: 533203 -38.244545
Message: 43.
Subject: 066406 -41.239887
Message: 64.
Subject: 599609 -44.312656
Message: 86.
Subject: 132813 -46.771450
Message: 107.
Subject: 666016 -48.825737
Message: 129.
Subject: 199219 -50.849747
Message: 21920.
Subject: 800781 -97.054619
Message: 21942.
Subject: 333984 -96.775703
Message: 21963.
Subject: 867188 -95.877045
Message: 21985.
Subject: 400391 -96.678421
Message: 22006.
Subject: 933594 -97.038101
Message: 22028.
Subject: 466797 -97.062126

Peter Shute
Sent: Wednesday, 11 June 2014 7:29 PM
Subject: [Nature Recordists] text spectrograms?

Hello list!
My question might sound somewhat exotic but it is something that
occupies my mind this morning.
While editing my recordings I sometimes do a bit of equalization. And I
am still not satisfied with it. I am blind and not able to view the
spectrogram of a sound file. That's why I have to adjust frequencies by
trial and error method. That's fine for High pass filtering but it is
not practicable for subtle tasks. That is why I am wondering if there is
any way of exporting/converting a spectrogram into a concise text file
so that I have a clear overview of the prominent developments of
I would be glad if there is a chance, please let me know!
best regards from Germany

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