the first post was probably lost, I didn't receive it myself (it's the second time it happens to me, maybe there's a problem)

----- Message transféré de brevalju@etu.utc.fr ----- Date : Sat, 6 Mar 2004 23:19:02 +0100 De : brevalju@etu.utc.fr Adresse de retour :brevalju@etu.utc.fr Sujet : [PD] [vcf~] : Q / output level relationship À : pd-list@iem.at

hello

I'm using the [vcf~] filter quite a lot these times

of course, when you raise the Q factor, as the peak narrows, the volume decreases

I would like to set up something automatic that tunes automatically the output volume of vcf~ in function of Q

For example, something simple like output_lev = input_lev * k * Q (if Q > 0) where k is a multiplicative factor I don't know about this "k" factor ; I could find it empirically, but isn't there a more serious way of determinating it ? (assuming the input signal is white noise)

Also, when Q = 7, for example, what is the bandwidth of the filter ?

thanks a lot for your help

j

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