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Here an interesting software by Christoph Lauer to create SONOGRAMS (or spectrograms).
I have been experimenting with it recently, so I am not yet able to fully evaluate all the various functions, so I reserve me to do it as soon as possible. Among the various features, this software also allows you to create 3D sonograms, very effective if used in a video presentation and to be able to appreciate multiple parameters at the same time.
Here a Video tutorial made by the author.