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Most of the audio editors are able to show us different kinds of audio analysis like this:
The generated images can be saved one way or another.
Is there a command line alternative to do this?
Windows 7. A multi-OS solution is preferred.
One of three tasks could be performed with SoX:
sox file.wav -n spectrogram
![](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="32" height="32"><rect fill-opacity="0"/></svg>){kind=small}
for %w in (*.wav) do ("p:\sox-14-4-2\sox.exe" "%w" -n spectrogram -o "%~nw.png" -r -m -y 130) - (where the sox.exe is obviously pointing at the right one)
– twobob
Jul 22 '16 at 2:12
You can use ffmpeg to create spectrogram
ffmpeg -i inputfile.mp3 -lavfi showspectrumpic=s=800x400:mode=separate spectrogram.png
Filter documentation: https://ffmpeg.org/ffmpeg-filters.html#showspectrumpic
Since I couldn't find any windows examples, I've created a batch file you might find useful for automating all flac audio files in a directory, or which ever extension you choose to run, and creating a spectrogram for it (just change the (".*.flac") to (".*.extension") if you want them for different audio files) here:
FOR %%F IN (".\*.flac") DO sox.exe "%%F" -n spectrogram -p 2 -S 5 -y 240 -c "%%~NXF" -o "%%~NF.png"
Create a text file and put that code in it and save it as filename.bat, then run it with the files you choose in the sox directory, unless specified in another place. You can modify the colors as you see fit with -p 1 to 6.
Imagemagick would be the solution, but the screen capture does not seem to work in Windows (it's looking for an X server).
Refer to the answers to this similar question here for other options.
