[sdiy] Good 24db/oct HP-LP-BP-Notch filter Schematics ??

[Chris McDowell]

Wow that’s a pretty cool module! The resonance in/out is really interesting, I’d love to play around with that. 

In the manual it says the module consists of 4 resonant filters in parallel. Could that just be 4 SVFs? Tom pointed out that for the 24dB/oct highpass, the input to the second svf needs to be the highpass input, so with 4 SVFs you could have all combos simultaneously. Quite the shotgun approach but still very interesting. I wonder what that resonance output actually is! 

Chris

On Mar 5, 2014, at 5:08 PM, Michael Zacherl <sdiy-mz01 at blauwurf.info> wrote:

> 
> On 5.Mar 2014, at 23:45 , Mattias Rickardsson <mr at analogue.org> wrote:
> 
>> Seems almost impossible.
>> Could it be a major typo? :-)
> 
> ;-) 
> http://www.analoguesystems.co.uk/pdf/RS110.pdf – first page, last paragraph …
> 
> m.
> 
>> On 5 March 2014 21:18, Florian Anwander <fanwander at mnet-online.de> wrote:
>>> Hello Tom
>>> 
>>> On 05.03.14 19:23 , Tom Wiltshire wrote:
>>>> 
>>>> I can't see a simple way (that is to say: actually likely) that they've
>>>> built this. It's starting to bug me!
>>> 
>>> 
>>> and it becomes more bugging if you look at the pictures at
>>> schneidersladen.de:
>>> 
>>> http://www.schneidersladen.de/en/analogue-systems-rs-110.html
>>> 
>>> click on "more views" and you start to wonder, which ICs should make this...
> 
> 
> 
> --
> http://mz.klingt.org
> 
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