Yo Marco. Shure its possible, just get some OpAmps et al. and go for it ;-)

I really think that I can't do that by myself.
How many filterborad do you think I need (two complete shruthi's with DSP and polivosks for example?).
Marco

To be clear: what do you need that the existing dual SVF board cannot provide?

The dual SVF board has two filters. They can be configured as serial / parallel and can process external inputs. You can use the Shruthi-1 mod matrix to program complex cutoff/resonance modulation patterns.

Yes on sideckick woul be ok. Can I put svf dual on sideckick without patching firmware?
Marco

The Sidekick has no firmware!!!

If you put the dual SVF board on a Sidekick:

• You will have to remove the 4053 and put 3 switches inside.
• You will not have any dedicated control or mod source for the cutoff/resonance of the second filter.

There is no way to get envelope following on the Sidekick / Shruthi. The external audio signal arrives and stays on the filter board.

Hi
I used to have a Sherman Filterbank, and i own a Dual-SVF Shruthi.
They don't really sound the same (even if with the 0.95 firmware and the coupling mode with offset you can get some similar things).
The Sherman is dirtier, as the filter is made to be overdriven by the input level, and it can self-oscillate, iirc.
Some features i liked a lot on the Sherman was the Amplitude modulation and the analogue FM, which should not be overlooked.

I haven't yet tried to use my SHruthi as a filter, so i don't know about the filter's behaviour when you overdrive the input, and i don't know if there is a way to make the lfo go up to the audio range ?

Ah I see then it’s probably not a SVF but more a “pole mixing” thing like the Oberheims or this weird Schippman thing. Doesn’t look like it will fit the Shruthi-1 board size / control interface constraints.

If you want something like the Filterbank, but build it yourself, perhaps Oakley’s Filtrex II could be of interest?

But back in stock in April they write…

@pichenettes: the answer is I'm noob. Sorry.
@fcd72: I know that if you want a knife is better to buy a knife but sometimes a cutter is 3-4 times less expensive and can do the job. I'm not professional on music making, so I asked something similar to sherman's filterbank. I can say Good enough, not the same.
I took a look on effetrix II and it is interesting also if sold out till april, but I think is sounding very different from sherman's filter.
Thanks to all, We are going close to the result indeed.
Marco

@Lindeborg:

thanks for the hint about filtrex beeing available again.
it is tmepting, but looks expensive and hard to source with all the that ics and all.

is there a estimate cost somewhere for all the parts?

“Total cost is around 150£, very much depending on the quality of your chosen enclosure”
^- Taken from the Oakley site, as far as I’ve figured it out, they used a 35£ enclosure+frontpanel from schaeffer though..
I’m really considering doing a stereo version, this however depends heavily on if i get my hands on a Novation Supernova II keyboard or not
(If i do I’m going to spend the next year or two in a cave with it).

i had a more detailed look at it now.
i am still not sure about it, but i think i`ll get one.

maybe we can team up sourcing some components.
i noticed these that300P are only available in quantities of 3 and more from profusion which seems to be the main distributer (at least in europe). musikding and banzaimusic doesn`t have them.
i didn`t look at the other parts yet.

Is this thing all that cool? I found the sound samples to be sort of underwhelming… It’s a long way from the mangling capabilities of the Schippman or the Sherman filters. The Shruthi filters seem way more intense, especially the digital board and the Dual-SVF.

I don’t know. I’m just thinking out loud… sorry. I certainly do not need another well-behaved, sedate, filter in my lineup. I have always liked the sound of the Schippman Ebbe unt Flut, but the price has kept me at a safe distance.

I bought some stuff to start a break out box for my Sidekick. I don’t know where the hell it’s going to be honest. For starters I want the Smurf matrix on the outside so I can work with it. I learned the hard way that you don’t want to connect two sources to the same destination, but I was thinking maybe a bunch of BBM rotary switches? They would allow me to route out all of the options on the fly and eliminate the possibility of connecting two sources to one destination. Seemed like the simplest way to accomplish it… After that, I thought I’d start to poke around in the circuit and see what I can find. I’m going to connect the boxes with IDC connectors and ribbon cables.

Found the THAT300P matched transistor array at Mouser.