[sdiy] Filter slopes

Richie Burnett rburnett at richieburnett.co.uk
Tue Jun 12 10:29:55 CEST 2018

No worries. I used to lecture on analogue filters to engineering students so the theory is still fresh in my mind. 


Sent from my Xperia SP on O2

---- rsdio at audiobanshee.com wrote ----

>Thanks for explaining this. I was trying to figure out how any of them could *not* be second order.
>On Jun 11, 2018, at 1:25 AM, Richie Burnett <rburnett at richieburnett.co.uk> wrote:
>> The SVF BP output is "second order" or "two pole". All of the output responses are second order. The transfer functions of all outputs have a denominator polynomial that is 2nd order in 's'. It is the numerator order that changes for LP, BP, HP outputs and it essentially tilts the LP frequency response for increasing powers of 's' to get BP then HP.
>> -Richie, 

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