[LAU] looking for fast spectrogram -> jpg/png/gif

[algodon]

Hi !
I use sndfile-spectrogram. It's great
http://www.mega-nerd.com/libsndfile/tools/


Niels Mayer wrote:
> 
> Are there any command-line tools to take a sound file (e.g. wav or mp3
> format) and output a corresponding audio-range spectrogram
> as one or more image files, either jpg,gif,png ?? Yes, it would be a very
> "long" image, or a series multiple images, each w/ a minute of spectrogram
> representation of sound.
> 
> Preferable would be something  like what
> http://www.sonicvisualiser.org/ outputs
> in "Layer->Add Melodic Range Spectrogram-> All Channels Mixed"
> 
> I'm aware of exellent tools like http://vamp-plugins.org/ && could
> certainly
> script something out of sonic-annotator, which would be too slow (the
> scripting and unnecessary I/O would be slow, not sonic-annotator itself).
> 
> Anybody have a http://vamp-plugins.org/vampy.html script that accomplishes
> this task before I go off and reinvent the wheel. Or better yet, an all-C
> or
> C++ solution?
> 
> One issue is how can a program automatically determine the best
> visualization of a spectrogram?
> Sonic-visualizer has controls like "Threshold" "Colour Rotation" and meter
> "Gain" that sometimes need to be tweaked. Anybody
> know where to find such a file->spectrum-image converter that
> automatically
> adjusts for best contrast between beats, bass, melody,
> so as to produce something that lets people easily visualize music
> features,
> without needing to do any manual adjustments??
> 
> 
> Thanks,
> 
> Niels
> http://nielsmayer.com
> 
> PS: speaking of spectrograms:
> Music: Broken Symmetry, Geometry, and Complexity
> by Gary W. Don, Karyn K. Muir, Gordon B. Volk, James S. Walker
> Notices of the American Math Society, Jan 2010, Vol 57, Num.1 , pp. 30-49.
> http://www.ams.org/notices/201001/rtx100100030p.pdf
> http://www.uwec.edu/walkerjs/MBSGC/
> 
> _______________________________________________
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> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
> 
> 


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