Module requests

I’ve been trying to figure this out too. It looks like there are 8 (or 4?) SMDs ICs on the board, but I can’t see what they are. I think they are Wien bridge oscillator - Wikipedia based oscillators.

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Wien bridge oscillators produce sine waves, not triangle waves, and are a bit tricky to control by voltage since you need to change multiple component values at the same time (and you also need to do some trickery to get them to oscillate in the first place).

Triangle waves are easy to make; just set things up so you charge and discharge a capacitor with a constant current, and the voltage across the capacitor will be a perfect triangle wave (or you can cheat and charge and discharge with a constant voltage across through a resistor; that won’t give you perfect triangles, but may be good enough). The trickery here appears to be how this thing is controlled (the description doesn’t really explain much).

(if you want a bunch of fixed sine wave oscillators, see here)

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so a bit of an update today on facebook I stumbled upon Tim Nijssen’s project which looks like a cool clock distributor! its a pcbs project give him a message if you Are interested! https://www.facebook.com/groups/549267875688193/user/1421697171/

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hmm

search up Tims name on Facebook you can add him and message him there :slight_smile:

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Or you can probably ping him here, right @TimMJN :wink:

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Good work @TimMJN!
It’s not a module I need now, but I’ve bookmarked it for when I do.

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Thanks for the shoutout Sam! I can be contacted right here, no worries. PCBs are up in the buy-sell threat: The BST Thread (Buy, Sell, Trade) - #133 by TimMJN

They are going kinda quickly, but I will do another run!

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I think it looks awesome. I feel kind of dumb I can’t figure out how I’d use it.

-Fumu / Esopus

Apart from being a normal clock divider, the rotate function allows you to generate complex “polyrhythms”. I put that in quotes, since it’s not polyrhythms in the classical synth sense, ie multiple rhythmic voices with different sequence lengths. Rather, the rhythm becomes a series of N pulses at X clock rate, followed by M pulses at Y clock rate etc. Depending on how you trigger the rotation, the sequence might not repeat for a very long time. I’ve found an excellent example here:

Also, it tracks accurately up to a few kHz, so you could even use it to make pulse wave chords.

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I want to bump awareness of something I vaguely put out there earlier. I’m excited maybe someday I’ll release modules. Until I do I wanted to put the awareness out there of other quad LFO sources like 4ms Quad Pingable LFO and Xaoc Batumi. It would be nice having a utility not too fancy multiple LFO and external sync. I see global LFO’s on non modular synths like Novation Peak but modular people seem to not consider they added more VCO’s than they could ever need but they ran out of LFO’s. I might be interested in collaboration on a multiple. It does look like an LFO and a multiple but when you consider having different LFO’s with a tap tempo it’s a bit greater.

-Fumu / Esopus

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thanks kardashev, synced up LFO’s??? its quite funny as I was planning a 6 lfo set but un synced, I have never really found a need for synced LFO’s found the need for out of sync ones phasing? the VCLFO’s have sync, maybe a duel version with less knobs could be cool, it can be synced and not synced, there is also that clock source out in the wind! by Tim

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Sam,

I’ve heard that some of the multiple LFO’s have phasing options which I would think is loads of fun! You could have for example each LFO one 90 degree ahead on the cycle. Yes dual LFO’s is all I think is not in the picture maybe quad is a lot.

-Fumu / Esopus

I started working on a quad/oct LFO (basically a DivKid Ochd in Kosmo format), which doesn’t have sync but does have a master control knob with CV input and an attenuator. I think with real sync and division it’ll be a lot harder or will require lots of Electric Druid chips.

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I’m just guessing here but maybe a 75 or 100 mm wide dual LFO module is the sweet spot for something with 4ms-like features. 25 mm of width might just fit e.g. the four jacks, two push buttons, and one knob used per channel in the 4ms design — but the front panel would probably be cramped at best — and a 50 mm module maybe could accommodate a PCB big enough for two channels if they shared enough parts. Better would be 75 or 100 mm for a dual LFO, and it would likely have room for a sync output for daisy chaining. Quad would have to be either very cramped or more like 200 mm wide — and you could do that with two daisy chained 100 mm duals.

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Rich,

Signed on with dual LFO plus sync output working in 75 or 100 mm wide module.

-Fumu / Esopus

Man oh man, current events sure is making the shipping on my LMNC kits rough.

My solution was to double my order. If I’m going to get screwed, I at least want to be a screwed guy with a lot of Kosmo sequencers.

Seriously, keep em coming. I’m so hyped for that expanded delay module you teased a while back.

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I wonder if there is some sort of bulk shipping deal to the US that we can get going. Maybe a big group of us from the form?

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That’s an interesting idea. The trick is passing them out once they get here.

I’m not sure if Kosmo is big enough to justify a reseller here in America… I’m usually good for 1-3 of each kit myself, and whatever I buy, I usually end up wishing I had more.

Sam and I have surprisingly similar taste.

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I keep thinking, if you could make being a reseller of Kosmo kits JUSSST break even; that would still be a pretty sweet deal.

Cause then you could spend the rest of your time being Scar Face on top of a pile of PCBs getting high on your own supply.

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