Le primidi 21 thermidor, an CCXXIV, Florin Andrei a écrit : > Using python/numpy or some other tools, I calculate the spectrum of the > whole song, either all at once if possible, or using a reasonably large, > shifting time window. > > I store that spectrum in a matrix.
And stop right here. If you compute the spectrum of the whole song, you do not have a matrix, you have a vector. There is no time dimension in a spectrum, it is the distribution of frequencies in the whole piece, period. If you have a time dimension, that means you are doing something more complex than a spectrum. You need to understand exactly what you are doing, or more precisely what the others tools are doing for you. Then you can jump back to my first mail. Regards, -- Nicolas George
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