Re: Equalizer Effect Output Levels

Hi Paul,

I'm afraid this isn't possible as there is no mechanism in place to query
properties from an Effect hosted in an Auxiliary Effect Slot.   I don't
think the Equalizer effect as it is today would give you the values you
need for your spectrum analyze anyway.

Dan
Creative Labs (UK) Ltd.

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             04/01/2009 09:56          [Openal-devel] Equalizer Effect    
             AM                        Output Levels                      
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           
                                                                           





Hi there,

I'm trying to create a little visual effects program which uses OpenAL. The
idea is to change the colours of the scene in time to a music track.

I was hoping to use the built in EFX equalizer as a spectrum analyzer. The
four bands would be ideal for outputting to a graphics shader vector, as
long as I have correctly "tuned" the frequency bands to the music I'm
using. This would save me having to write any filtering functions.

So my question is: Is it possible to get the output levels of each band in
the equalizer which are used in the final mix?

I don't need to hear the equalized track, so I can set the effects gain to
zero. I will pay out the direct sound and hopefully just use the relative
levels of the equalizer bands as some input to the graphics shaders.

Thanks,
Paul_______________________________________________
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