[ssalazar]

True, i was thinking of a spectrogram as purely a visualization of a time-series of DFTs but Matlab and other tools do not make this distinction.

I was mainly responding to the OP's distinction between analyzing a visual representation and analyzing a "2d array" when they are basically the same thing.

[throwmenow_0140]

> analyzing a visual representation and analyzing a "2d array" when they are basically the same thing.

This is what I mean. I guess their tooling just outputs graphics and it's easier to work with those than the pure 2d array in numpy or something similar.

[jmmcd]

No, the graphics are only being used as part of the explanation. The algorithm is not working with them.