Re: [pygame] Sound to Light

[Alex Holkner <aholkner@xxxxxxxxxxxxxx>]

Pygame has no function for this.  You need to perform a Fourier 
transform on the sample data.  Python will certainly be too slow to do 
this in real time, but Numeric and friends have fast Fourier transform 
(FFT) functions that would do nicely (Numeric.FFT, numpy.dft).  You'll 
want to do the transform in a mixer post-effect callback.  You can't 
hook this callback in Pygame, but Pygame-ctypes provides it (via 
SDL-ctypes using Mix_RegisterEffect).

Alex.

Chris Ashurst wrote:

> I was wondering if the mixer class in PyGame has any sort of ability to
> read/determine the frequency currently passing through it (I'm having vague
> ideas about some sort of sound-to-light/equalizer thing going around in my
> head).
>
> I'm kind of 90% certain that the answer is no, but I figured PyGame would be
> the best place to ask about it.
>
> *If* the answer is no, then would it be because Python isn't fast enough for
> that processing?
>
> Hope someone can point me in any kind of Python-direction on this :)
>
>
> ~Chris
>
>
>
>
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