[music-dsp] Bandpass IIR Gain Factor

[Vesa Norilo]

You thanked me a bit too early, again ;)

The exponents for z:s should be negative, z^-1 and z^-2.

Sorry for the triple confusion.

Good luck,
Vesa
> thanks a lot. 
>
> Vesa Norilo schrieb:
>   
>> Vesa Norilo wrote:
>>     
>>> Hi Thomas,
>>>
>>> The Z-plane equation for your filter is
>>>
>>> H(Z) = (a1 - a3 z^2) / ( 1 + b2 z + b3 z^2 )
>>>
>>>
>>>       
>> Sorry, the nominator should be (a1 + a3 z^2) which is in your case a1(1-z^2)
>>
>> V
>>
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