Ways of using Fourses Module?

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tenshun
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Ways of using Fourses Module?

Post by tenshun » Thu Mar 05, 2020 5:34 pm

Hi,
i just picked up a Fourses module to go along with my other Mobenthey modules.
i was just wondering what are some of the ways you are incorporating it with the other modules?

So far i have been mostly using it as a modulation source with the capacitor switches set to the lowest setting. frotm there i am sending the differnent outputs to other Mobenthey line.

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Re: Ways of using Fourses Module?

Post by ookrsia » Sun Mar 08, 2020 7:24 am

I'm interested in any answers, as well. Just recently got a set of IFM modules, Fourses included. Still havent had time to get into it really.

Based on a quick read the whole concept of the Bounds/Bounce seems quite hard to understand, meaning in what way in reality it actually effects the oscillators. This might be somethign that is very obvious after you've just done some tests, but I was kinda sad to realize there's so little information about IFM modules in the world, and even in this forum.

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Re: Ways of using Fourses Module?

Post by numan7 » Sun Mar 22, 2020 11:04 pm

there is (or at least has been) a history-of-fourses document somewhere on the ciat-lonbarde web that goes into the the evolution and the variations of the concept (arp-type, serge-type, tarp-serge-type, etc). you might find it a bit idiosyncratic (like much of the cl universe), but it's all good (imho).

now as you might be aware, the eurorack version lacks the "interspezal sexon" portion of the full/classic instruments which handled the coupling of electrical currents from the interface surfaces (usually constellations of brass screws in wood panels, called "sandrodes", patched with test-lead cables and capable of being modulated by touch) to the circuits.... you can attempt to simulate the missing behavior by modulating the top two cells with the output of the bottom two cells patched through a dual sample-and-hold module (or quad if you've got a pair)... and then maybe patch the outputs from the top cells to the audio and cv inputs of a low-pass (or band-pass) filter (or something like that)... and maybe find a way to couple to a touch surface (like intellijel tetrapad, for example)... like gate-outs to s/h trigger ins, pitch-cv outs to bottom/lower fourses cells cv-ins, pressure out to cv-amount of (or vca cv in front of) lpf/bpf, etc.... it's actually very nice to have pair (of fourses) if this ('interspezal sexon simulation') is something you're attempting to do.

and besides that, fourses can act as a quad-oscillator that can exhibit interesting and/or chaotic behaviors in complex patches (if you're into those sorts of things) - i'm admittedly not always completely pleased with the sounds mine make, but i nonetheless almost always find them interesting (sometimes modular synthesis is more akin to wrestling or karate for me than it is music listening - and i find fourses to be a true kung-fu fighter in that regard).


cheers
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numan7
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Re: Ways of using Fourses Module?

Post by numan7 » Thu Mar 26, 2020 1:16 am

:roll: you know, that seems like a rather superficial way of describing things....

:hmm: so let's try this again...
yes it has four oscillators inside, but you also get to modulate each of the "perspex tube" boundary voltage levels between the adjacent oscillators (...so in a way it could be thought of as having eight waveshapers).

and then you get two outputs per oscillator (one of the hallmarks of the ciat lonbarde instrument design philosophy, btw - i think PB calls it the verso-inverso principle... or maybe it's the other way around - then again, that concept might be more about the touch interfaces such as are found on the tet/sid organus family of instruments - i forget and should go read up on that stuff again...) that are related in frequency but also subject to what is going on at each of the boundaries.

in practice i find it a useful metaphor to think of fourses as a physical model of some spongy or elastic solid material, moreso than as a quad oscillator with waveshapers (or whatever). and i believe this viewpoint came about from reading one or the other of PB's CL articles (but again it's been a while, and i should revisit all that stuff sometime).

at the moment, one of my fourses is interpatched with a eurorack wogglebug (smooth/stepped, random) and a maths (slew limiter and cv processing) module that are in turn controlling and influencing a bunch of other modules. this patch had already been set up for a number days and had kind of run its course and was starting to seem dull. adding fourses breathed new life into the patch and made it more interesting (to me at least).

let's see... it's nothing very complicated (yet at least) - the wogglebug's 'woggle cv' output is modulating fourses lower bound 2, while fourses low/inverso(?) bounce output 3 is patched into the wogglebug's sample/hold input (and this used to generate the wogglebug's stepped output which in turn is patched into a quantizer that is patched into various pitch-cv inputs and so on). the fourses range switches are set at low-high-low-low (for 1-4). maths channel-1 end-of-rise output is patched into the wogglebug's clock input. at this point i'm thinking of patching another of the fourses bounce outputs into one of the maths inputs (and maths outputs to bounds inputs, etc.). we'll see where it all goes tomorrow...

anyways i hope that's somewhat helpful and that you have fun with your fourses!


cheers
"the ordinary will ignore whatever they cannot explain as if nothing ever happened. and everything remains the same again..."

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Re: Ways of using Fourses Module?

Post by jimmie » Thu Mar 26, 2020 9:32 am

thanks for interesting read. please keep coming!

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Re: Ways of using Fourses Module?

Post by pugix » Wed Apr 08, 2020 3:54 pm

numan7 wrote:
Thu Mar 26, 2020 1:16 am
and then you get two outputs per oscillator ... that are related in frequency but also subject to what is going on at each of the boundaries.
The Fourses eurorack module actually has just one output per oscillator. Peter calls it the 'position' output. The other four jacks on the right side are the Bounce (frequency) modulation inputs, each with an attenuverter.

As to the 8 Bounds inputs, if you patch fixed voltages into those, they override the internal cross-modulations. This separates the oscillators and you can control them separately.
Richard
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Re: Ways of using Fourses Module?

Post by triangle » Wed Apr 15, 2020 11:23 am

Anyone else notice and do anything about those familiar cross icons on the back of Fources pcb? I looked on a scope and for each oscillator the square cross is a squarewave, the pointy cross looks like an attenuated version of the triangle out. I wonder if it would be possible to just wire those to jacks on an external panel?
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Re: Ways of using Fourses Module?

Post by tenshun » Sun Jul 05, 2020 11:09 am

triangle wrote:
Wed Apr 15, 2020 11:23 am
Anyone else notice and do anything about those familiar cross icons on the back of Fources pcb? I looked on a scope and for each oscillator the square cross is a squarewave, the pointy cross looks like an attenuated version of the triangle out. I wonder if it would be possible to just wire those to jacks on an external panel?
I never noticed those markings on the back!
Did you ever try adding some outputs to those areas?

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Re: Ways of using Fourses Module?

Post by triangle » Tue Jul 07, 2020 3:24 am

tenshun wrote:
Sun Jul 05, 2020 11:09 am
I never noticed those markings on the back!
Did you ever try adding some outputs to those areas?
No, but those square seem like they could be fun...I like to run all four Fourses out to various inputs of Sprott and running Fources square outs into the Sprott diode inputs and etc. would probably be very interesting.

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Re: Ways of using Fourses Module?

Post by EATyourGUITAR » Wed Jul 22, 2020 9:47 pm

triangle wrote:
Wed Apr 15, 2020 11:23 am
Anyone else notice and do anything about those familiar cross icons on the back of Fources pcb? I looked on a scope and for each oscillator the square cross is a squarewave, the pointy cross looks like an attenuated version of the triangle out. I wonder if it would be possible to just wire those to jacks on an external panel?
yes and no. if you don't buffer the extra output jacks, you may open yourself up to damage or unexpected behavior. you may find that the rate changes when you patch and unpatch because you loading something. there is also a chance that it is totally safe and it will work perfectly. a more prudent approach would be to email peter blacer and tell him your idea. ask if you need buffers. ask if it voids the warranty. ask if it will be damaged.
http://ciat-lonbarde.net/paper/fourses.pdf
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Re: Ways of using Fourses Module?

Post by triangle » Thu Jul 23, 2020 2:21 pm

EATyourGUITAR wrote:
Wed Jul 22, 2020 9:47 pm

yes and no. if you don't buffer the extra output jacks, you may open yourself up to damage or unexpected behavior. you may find that the rate changes when you patch and unpatch because you loading something. there is also a chance that it is totally safe and it will work perfectly. a more prudent approach would be to email peter blacer and tell him your idea. ask if you need buffers. ask if it voids the warranty. ask if it will be damaged.
http://ciat-lonbarde.net/paper/fourses.pdf
Thanks for the input. Yeah Peters always been really helpful whenever I’ve emailed him questions. It was several years back when I asked him about those similar circles on the back of Denum and he said they were left/rite audio for attaching to some summing mixer module..maybe, can’t remember clearly but didn’t sound like he was planning to pursue it anyways and I’m not confident enough to risk damage...maybe someday

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Re: Ways of using Fourses Module?

Post by EATyourGUITAR » Thu Jul 23, 2020 2:27 pm

I you reverse engineer the eurorack module back to a schematic we can tell you if it will be safe. Maybe you can ask for the schematic for the eurorack module when you send that email. If you have buffered mults you can do it anyway. There is no problem there.
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Re: Ways of using Fourses Module?

Post by tenshun » Sun Aug 02, 2020 12:50 pm

i found out i can use Fourses as experimental drum module!
i was sending triggers into the trigger up on 2 different Swoops (one for kick and the other for snare) and taking the triangle outputs from the Swoops and patching them into the 2 top control inputs of Fourses.
i was taking the position out from the very top oscillator as my sound out.

With a little knob tweaking on Fourses you can dial in the right point where Fourses doesnt Oscillate and only sends out audio when the Swoops triangle out hits fourses.

also i have the third Oscillator on fourses switched to the bottom position all the other ones are in the middle position.

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Re: Ways of using Fourses Module?

Post by dorkmorph » Thu Aug 13, 2020 12:54 pm

i've gotten some pretty stunning (nightmarish) results from patching fourses into and all over sprott. s&h one of the outputs of fourses into bounds of a different oscillator. gets wild quick!
It's taken me a lot of time to get familiar with the behavioral relationships inside the fourses. It's really a lot like a "traditional" mixer feedback loop with way more range and control flexibility.
Patching in stereo, one fourses out each for L&R, gave me a good way to familiarize myself with the way each oscillator relates to the others.
such a sick instrument!

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