Vadim,

I was more refering to the analog multimode filter based on the moog cascade I 
did some years ago, and found it amusing to find a warning against it.

Anyway, excellent writeup, I wish I cuold have it printed as a proper book for 
more relaxed reading.

Stefan


> On 31. Oct 2018, at 16:29 , Vadim Zavalishin 
> <vadim.zavalis...@native-instruments.de> wrote:
> 
> On 31-Oct-18 15:58, Stefan Stenzel wrote:
>> Thank you very much, Sir!
> 
> You're highly welcome, Sir!
> 
>> But why the warning about multimode lattice filters?
>> In my case, this comes way too late!
> 
> I'm not sure I'm fully following you... Or are you referring to this:
> 
>>> New additions:
>>> - Generalized ladder filters
> 
> You mean, why isn't this discussed in Chapter 5? Well, good question. But in 
> the same sense, one could ask why generalized SVF doesn't come in Chapter 4. 
> Chapter 8 is specifically concerned with building filters with arbitrary 
> transfer functions of arbitrary orders, whereas Chapters 4 and 5 rather deal 
> with structures commonly used in synths (more or less), and from this POV it 
> belongs there. Also, had I discussed it in Chapter 5, it would have been 
> difficult to derive it from the generalized SVF idea, which in my opinion is 
> highly educative.
> 
> Actually, are you by any chance aware of this structure being discussed 
> elsewhere? Haven't encountered anything like that so far (not that it's 
> difficult to derive ;) ), just wanted to build a nonlinear 2nd kind 
> Butterworth filter of 4th order, so needed something like that ;)
> 
> Best regards,
> Vadim
> 
> -- 
> Vadim Zavalishin
> Reaktor Application Architect
> Native Instruments GmbH
> +49-30-611035-0
> 
> www.native-instruments.com
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