[music-dsp] choice of Q for graphic equalizers

Shashank Kumar (shanxS) shanx.shashank at gmail.com
Tue Feb 7 01:39:10 EST 2012

I had a doubt regarding filter designing.
Filters defined in Robert's cookbook are iir filters, i.e. Phase
respone is non linear.

But for audio applications, like EQ design, isn't the phase response
supposed to be linear ?


On 2/7/12, Nils Pipenbrinck <np at planetarc.de> wrote:
> A quick question:
> I am writing a little 31 band graphical equalizer (three bands per
> octave), and I want to use the peaking-eq biquads from Roberts excellent
> filter cookbook.
> Everything is working fine so far, but I wonder what Q should I choose for
> the filters? is 1/3 okay?
> Cheers,
>   Nils
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