When get is high, LFO passes through to VCO FM input, when it is low, S&H freezes and sends out LFO CV value at the time of the gate change.

When gate is high, 5v goes to switch, letting signal straight from LFO to go through. When gate is low, switch instead outputs signal from S&H to FM in of VCO.

Gate to S&H control in first is inverted so becomes -5v when high, 0v when low. Then it is run into a +5v offset so that when it is high, the control signal going to the S&H is 0v but when it is low, it goes to and stays at +5v so the S&H samples only then and holds that value.

To reverse (value held when gate high, LFO passes through when gate is low) just swap that A & B inputs into the switch and send the normal gate into the S&H control input with no inversion or offset.


Oh I wasn't trolling you @syntasis! Your rack is certainly very small by the standards of the MG faithful.


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Hi all,

I have finally moved into a much larger house with tons of new extra studio space for my modular gear! Looking for ideas and tips for the following:

  1. Desks what large comfy desks work great for massive eurorack rigs that don't cost a fortune or require lot of custom building
  2. Monitors- what studio speakers do you like and why?
  3. Sound proofing for acoustic treatment. I want to sound treat for ideal recording situations for my new Youtube channel that I plan to setup in the future.

Thought I'd take a Serge crack at this one too and see how they compare, check it out:

https://stevehand.bandcamp.com/track/tuesday-acid-serge


I have had a first go at creating a Krell patch with MI Plaits, Maths and the 2HP RND, plus a few other bits and bobs.

I continue to be interested in the Buchla format and was very surprised to learn that much of the 200e series is digital. Learning how the 25e Buchla oscillator works made me take a closer look at my Plaits module and I have come back to it with increased respect and a desire to see what I can coax out of it. It's not like a Buchla module, I realise that, but I am finding that the more I learn about Don Buchla's work and designs, the more I learn about synthesis and patching in general. I have also been watching Todd Barton's videos over at his Patreon site. This is a great resource, especially if you are new to modular like myself.

Hope you enjoy my video. If you do happen to like it, please can you click the 'thumbs up'. It makes me so happy! :)


Great ideas! Thank you for sharing.

There is an expansion port on the back to add more features. There will be at least one expansion in the future. Can't make any promises on what the features will be at this point.

The module does normalize inputs to their ascending outputs. For example, if you plugged a signal into input 1, that signal would be copied to all of the outputs 1-9. If you then plugged another signal into input 3, input 1 would be copied to outputs 1-2, and input 3 would be copied to outputs 3-9.

The module does not sum all inputs to one output. That is a function I am looking into for the expansion. You could use a summing mixer to accomplish this.


Great idea. I've recently found myself in need of several of these functions. Will put the O'Tool and Test 3 on the list.


Thanks guys :)
I plan to add a Prok Clap module to my rack at some point, but then Claps and extra hats come from the Roland TR-09.
I prefer a Clap over a Snare.

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

https://youtube.com/@wishbonebrewery


@the-erc N0 plans for a CD at the moment but I'll make it available digitally when the last few cassettes are gone. I guess using size as an adjective for a rack isn't the best as it's all relative! I was comparing to some of the impressively big racks that I see here and other places :)


Nice work! Love it when the claps come in towards the end.


It would be cool to also have the option (jumper on the back maybe?) for the outputs to be normalized to the next allowing for manual playing of multiple modulation sources (LFO at different subdivisions, etc) on-off to be fed to one destination, etc.

Just a suggestion. :)


I've been super impressed by my O'Tool Plus so far, I'll have to check these other modules out. Thanks @Lugia.


Built up a little something...this is a test bench build for Eurorack.
ModularGrid Rack
This uses a powered 4ms Pod 48X cab. From left to right:

A CG Products PCV3 and a Mazzatron Testy allows you to test ANY synth patchcable...1/4", banana, and 3.5mm.
The Animodule TrAniModule gives you a 1 watt output amplifier and speaker to check audio outs.
The Joranalogue TEST 3 lets you check individual module current draws and other important DC level checks.
A 2hp DC gives you three possible fixed voltages...very useful for checking CV scaling and tracking.
The big draw here, of course, is Jones's O'Tool's latest revision, offering frequency measurement, an o-scope, voltmeter, and a pile of other test functions.
And last, a Metro Modular Test Eagle Option 10 gives you four dual bananas for connecting external test gear, with appropriate impedance and level settings for typical devices of that sort.

This isn't a synthesizer, of course...but if you have a sizable Eurorack (or other) modular rig, a little skiff like this with these sorts of modules definitely gives you 95% of the key test functions you need to keep that synth operating to spec.


Not really...if you compare it to the Maths, for example, you realize that the Contour 1 is a bit more like a Serge USG, so you can define the attack and release of the envelope follower function with it. But at the same time, it won't be an exact envelope follower, as this will tend to slow down the response to changes in amplitude, and a real envelope follower should track those changes a bit more "precisely". So while this might work for a sustained signal source, it won't work so well for something expressive...say, for example, if you wanted to play lead guitar through the synth, you'd WANT the exacting envelope follower output values so that you can continue to capture the guitar's true dynamics.


Daaaamn...that's a serious blue cat there! Awesome eating!

Seriously, funbun, you need to get up to Nashville and try out the rockfish thing down below Percy Priest dam during generation. Won't need a boat...just find a good bank spot and when they sound the siren, get something in the water! Those rocks go BONKERS!


Along Jim's lines about filters...yeah, having two different filter characteristics on hand is VERY useful. My take on the "character" VCF would be to go with a Steiner-Parker Synthacon filter...having had a Synthacon and gotten to appreciate the level of "yowl and shriek" that that design can do, it has always struck me as one of the best choices for a "lead voice" out there. Check Tiptop's Forbidden Planet VCF...probably one of the best versions out now in terms of space (8 hp) and super-simplicity. Another great is Doepfer's MS-20 Sallen-Key version, the A-106-1. Not only is it capable of a lot of different timbral colorations, its resonance path has an INSERT point in it...which allows you to mess with the filter with some non-filter things, like delays, wavefolders, distorters, and the like.

MIDI, though...since you want to use a keyboard controller, you may as well have a MIDI interface that knows what a "class compliant" controller is instead of going thru some other MIDI interface from some other synth, etc. So for that sort of thing, plus expandability (up to 64 assignable CV/gate/trig outs), have a look at Expert Sleepers' FH-2.

Lastly, probably one of the best values in modulation signal screwery has to be Tiptop's MISO. $99 for a tool that can make your mod signals do backflips is 100% worth the price of admission! Either it, or 4ms's SISM...either are ultra-useful.


Yeah, it's a bit of a problem...but according to Perfect Circuit's specs, the 2 x 140 has 3A on the +12V rail and 1A on the -12 and +5V rails. But this only seems to be an issue on the -12V rail, since the build I specced was 887 mA on that. Everything else is within tolerances. Plus, the only ones on that -12V rail that do concern me (Braids clone, SWN, Zadar, Timizoara) don't appear to have significant -12V draws in of themselves, or they don't draw from that at all (BitBox). The big thing to watch, IMHO, would be dealing with B.'s "zone" configuration, as that master output gets split up sort of like how the Arturia Rackbrutes deal with the same issue.

EDIT: Saw this in another post of Jim's: https://www.perfectcircuit.com/wmd-soft-start.html A handful of these on your worst start-up draw culprits should smooth out that -12V rail at startup.


Hi Funbun,

Great video, I love it! Beautiful environment and river, so jealous :-) Of course nice sounds from your AE system that goes along with the video too!

Ha, ha, so bad luck the first time just before 02:00. Better at 04:00+ :-) Oh come on... at just before 06:00 you are making me hungry with that beautiful piece of fish in the pan! ;-)

Good video and nice entertainment, thank you very much for sharing this with us and kind regards, Garfield.

For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads


Hi Mowse,

He, he, that's a nice fun jam. I love the playfulness of this jam. It's a great enjoy to listen at it.

Thanks a lot for sharing this with us and kind regards, Garfield.

For review reports of Eurorack modules, please refer to https://garfieldmodular.net/ for PDF formatted downloads


I think the deadline is early April @the-erc.


I really love the WMD C4RBN, analog, multi mode, 4hp and with wave folding and saturation options.


This: https://www.modulargrid.net/e/g-storm-electro-delta-vcf-8hp
-- Lugia

Watched the demo. I see why you like it!


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Track sent.
Flying Species - Hypnotic Flight in Psychedelia (7:51 - 140 bpm)


Digging this very much.


Sounds great! Not having a tape deck any more, is this going to be available on more modern formats? Like CD? :)

Also :

tracks recorded live on a small modular system.
-- systasis

Just trolling!



I am maybe interested... but 100% busy with other things right now. Is there a deadline?


I recently watched DivKid's video on the Joranalogue Contour 1. At about 11:54 he shows how to use the Contour 1 as an envelope follower. Am I right in thinking that any slew limiter can serve as an envelope follower in this way?


May have to work on a new track to submit. Thanks again for supporting the MG community.
-- farkas

You are very welcome! Looking forward to hearing what you come up with!


Nice work :) thats quite a mix.

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

https://youtube.com/@wishbonebrewery


and yeah, it was switched off pronto.


Thank you so much for taking the time to give me advice.
I've moved a few modules around and it does seem to be OK now.
I will do a 3 row rack and post here, to double check.
Thanks again.


Cheers :)

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

https://youtube.com/@wishbonebrewery


I'd watch out for power with this (see other thread re 'electrical concern') - those go cases are a bit under-powered in my opinion and there may well be inrush issues with so many digital modules (at least 12 of the modules in this rack are digital at a quick glance)

I'd strongly suggest creating an abstraction of this case with 1 row per +ve rail power section - go to the bottom of the sheet view and you will see power consumption per row - or in this case per section of the +ve rail

this will enable you to see the distribution of power better - leave at least 30% free on each of the zones and each of the other power rails (especially the -ve)

if there are still inrush problems then either adding a rack wart psu or experimenting with inrush delays are going to be the answer - wmd make one

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities


I hope you switched off straight away!!!

are you sure the power cable is in the right way? on both the module and the busboard

are you sure the power cable is correctly made - red stripe should be to left when looking at the keyed side on both connectors - lining up with a tiny embossed triangle

have you left 30%ish overhead on each of those sections on the +ve rail?

it could be over draw on one of the other rails? -ve perhaps or 5v - same for headroom! I'd be surprised if it were 5v though, -ve not so much - I have a mantis, which b-company 'cloned' the go case power from, and I think that is under-powered on the -ve rail (but I have quite a few -ve hungry video modules in there)

if all that is ok - ie the connection is good and there is (supposedly) ample headrooom on all rails - then there's still the possibility of inrush being the cause - and not necessarily just from this module - it is cumulative - it's quite likely that if you have multiple modules with higher inrush draw than stated (often digital modules) that this can occur - so spread the digital modules out as much as possible - and if necessary shift them around a few times until it works - try moving things around so that this module is powered from another section - or remove some modules from that section and move them to another that has more room

if you still have problems - either add an additional power supply rack wart module style (ugly hp thieves that they are) - or wmd make a plug in for the power connector that delays the start up of a module for a short time to delay the inrush until other modules have started up

maybe creating an abstract version of your rack here would be a good idea - use 3 rows instead of 2 - each row is a section of the power supply - if you go to the bottom of the list view you can then see consumption by row (or in this case section of power supply) - I often do this where I have 2 power supplies for 3 rows in a diy case - if you make the rack public and copy paste the url in here maybe someone will take a look and help you

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities


I just added a Basimilus Iteritas Alter to my rack. I including it in a patch and the lights on all my modules started flashing, at the same time.
Is this a warning sign?.
My rack is a Behringer Go, it's got 3 x 1 amp sections, of which none are overloaded.


mostly the problem with wasp filters is that one of the chips dies - it doesn't happen that often from what I can make out - it's socketed so an easy replacement - no soldering required and the chips are cheap from what I can remember

20 seconds on google and I found it to be a CD4069 chip that fails - the originals are TI, but apparently ST or MCI have significantly better longevity - buy a few and you should be good

I only looked quickly at mouser - the TI chips are 0,52€ each or 10 for 4,39€ + tax and shipping

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities



Thanks for all the great suggestions everyone. I will do some further research.

@zuggamasta -- I have seen the Zlob SVF in your videos. Yes. :)

@farkas -- I actually bought a second hand Doepfer Wasp, but it arrived not working properly so perhaps you are right about its flakiness.

@GarfieldModular (or anyone) what's the difference between the OptoMix and the LxD? Just the Damp control? (Which is a slew limiter, right?) These are interesting but lack of resonance control seems a loss.

Anyone tried the WMD C4RBN? (or whatever it is called). Its tiny buttons put me off, but the demos sounds decent.


yes it makes more sense to me too

well filter is one of the things that maths can't do - here is what it can do (which is a lot): https://w2.mat.ucsb.edu/mat276n/resources/systems/CREATE_teachingSynth/manuals/8c_Maths2013-V1.11-printable.pdf

I would spend some time on youtube and forums researching filters - they all sound different etc...

I'd definitely look at doepfer filters though - as they are inexpensive and decent - mostly based on classic synth filters, as are most others to be honest, to a greater or lesser extent

maybe get a couple so that you can have some variation - one for the sub and one for the main output - maybe a wasp style (gritty) and a smoother moog style one - send each to a different cascading vca channel, but with a different rhythmic envelope going to each and different modulation to the filters and you suddenly get 2 voices from your single vco - buy doepfer and the pair together are cheaper than a lot of other filters - and just as good!

I'd be tempted to get a stages - it'll give you envelopes (from simple decay up to 36 stages if you chain 6 together), lfos, and a host of other functions as and when you need them - including a harmonic oscillator

I'd also recommend something for mixing (copies of) the outputs together to make more interesting patterns - a simple unity gain mixer with no controls will do the job - or a matrix mixer - which will do a much better job, but will be more expensive and take up more space

if the lfos you do get are uni-polar (stages is, for example) you might also want to consider adding something like shades - atttenuversion, offset, precision adder (for accurately adding v/oct signals) and mixer rolled into one

you may be thinking why do I need so many mixers?
(multed and) mixed modulation = (more) complex modulation
mixed lfo and envelope = tremolo effect
mixed v/oct and a tiny tiny bit of modulation (may require multiple levels of attenuation to get the right level) = vibrato
mixed vcos before filter = fatter (due to detuning etc) or accents one vco tuned an octave higher than the other - open filter more for accent
feedback
transposition - precision adder
etc etc

and all that may be for a single voice before hitting a final audio mixer - and most of those might want vcas and you probably want vcas for modulation on top of that - hence the saying - you can never have too many vcas - which should also be extended to mixers imo

as you are planning on playing from a midi keyboard - I'd get the midi converter asap and plan on adding as many simple adsr envelopes (as i suspect this is what you will expect to hear) as the midi converter has gate outputs - doepfer and frequency central both make great dual adsrs that are both reasonably small and inexpensive

"some of the best base-level info to remember can be found in Jim's sigfile" @Lugia

Utility modules are the dull polish that makes the shiny modules actually shine!!!

sound sources < sound modifiers < modulation sources < utilities


Hassle free transaction with @BrokenBo, module well packaged and in mint condition.


very melodic, the whistle reminds me of something else.

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

https://youtube.com/@wishbonebrewery


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I have one of the intelligel's µVCF and I'm more than happy with it. It's 6hp and comes at a reasonable price, though it's a 2-pole filter and may not have the character of some of the filters already suggested, it can show some attitude too with FM and self-patching.


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Yes, this is superb!


Thanks a lot guys :) You are all way too kind!

Enjoy your spare HP, don't rush to fill every last space, this is not like filling sticker books. Resist the urge to 'complete' your rack, its never complete so just relax.

https://youtube.com/@wishbonebrewery


Thank you very much!
It's just a pre-order, so there is only one part available on Bandcamp.
Full album will be available on April. I will make a video with patch from it in a few weeks :)


wow, thanks. this is starting to make a lot more sense. i think my original thought that i didn't ask was what the difference or if there is much of a difference than a 'mixer' or an output module or is the mixer basically serving the same function?

also i got the maths because i thought it was a filter. i still also need a envelope generator and a proper filter i suppose-if yall have any suggestions. also for an lfo. thanks a ton!


A quick jam tonight on the Moog stack with an appearance from Plaits.


makes sense... if I was in North America or Japan I would definitely invest in a good output module - thankfully I have balanced power though!

-- JimHowell1970

Ahhhh...THAT explains quite a bit! Since you're apparently in a part of the world where the way the grid works is more sensible, you've never battled with weird noise issues like those. Maddening stuff...

But yes, if you're spoiled by balanced power right out of the wall, the need for isolated outputs might not make sense, since that one factor alone gets rid of loads of the nonsense we have to deal with on this side of the pond when some awful sonic crud sneaks into the proceedings. OTOH, if someone's miswired the ground over there, your odds of noise don't increase...but the potential of using ungrounded gear is just plain scary! You could ask Keith Relf of the Yardbirds about that...maybe at the next seance...?


OK...I had a dive into this. One immediate thing that came up regarded the Doepfer 4 hp VCO...too deep. It's 65mm deep, and the back row in a B. 2 x 140hp rack is 62mm at its deepest. But I opted to go nuts here and show some possible other alterations...
ModularGrid Rack
While the basic sonic architecture stayed the same, a lot of things got altered, especially to support generative work.

Top row: Starts now with a CaviSynth Bufflide...3-out buffered mult with an additional slew limiter for portamento. You really only need this for the first "voice" here; the other two oscillators can be driven by single CV lines, although you could just as well use the buffered mult for all oscillators by splitting the CV needed for the two initial VCOs. Kept the Braids clone, added an Instruo Ts-L for maximum timbral manipulation, then fed these to a Bastl Waver, a waveshaping mixer. No VCF here; I opted for something more akin to a West Coast-ish approach to sound generation here for maximum "punch", especially on bass. VCA control is present on the Waver. The 4ms SWN now is followed by the Chopping Kinky, which lets you apply waveshaping to that poly-VCO, then this feeds the Moon Phase VCF. The Blackbox now feeds the Vult VCF. Then after that, there's your stereo mixer...a Bubblesound HexVCA's individual outs feed to a Happy Nerding PanMix, and this gives you VCA level over the signal as well as CV panning on all six channels. A 2 x 4 / 1 x 8 multiple closes the row out, as it seems like that might be handy here.

Bottom row: Mutant Brain, Disting, Pachinko, and the RCD modules. Then I swapped the Blue Lantern logic for Tesseract's VC Logics, which is a dual Boolean gate with CV over the gate function...this should be VERY useful for generative-based timing behavior changes. A Circuit Abbey TripFire then gives you a comparator to pick gates off of modulation signals, plus a pulse delay. Next is Stages, then the 4 hp switch, and at that point I went OFF on the modulation section. This got changed to a Maths, a Tiptop MISO for modulation manipulation, Happy Nerding's 3x VCA for your linear VCAs, a NANO Quart for two-stage envelopes and LFOs, then a Zadar + expander for the four-stage envelopes. The Clank Chaos is after this, more toward the end to make it convenient as a manual controller. Then the Erica DSP got swapped out for a Xaoc Timizoara for effects (much more powerful). Lastly, the very end has a 1 hp Konstant Labs PWRchekr...and given that this is in a Behringer cab, keeping tabs on your DC rails will probably be quite useful, indeed as the Behringer P/S in this is still something of an untested factor out in the field.

Changes: this now has EIGHT or thereabouts envelope gens, plus a Maths. Has a proper stereo mixer with VCAs for the inputs and CV panning. Module order has been clarified. 11-ish VCAs on board. Better logic capabilities. More potent FX processor. And there's a pile of incremental changes as well. The result is a definite power-up from the original, and even got rid of the Cre8 stuff as you'd noted in one post...which is fine, because tbh, I don't think much of their build quality. The only other major deletion was the Erica switch, but between functions on the Chaos and the retained 4-in switch, you shouldn't feel any real loss in control capabilities in generative work. The downside is that you apparently have many of the original modules already, and the overall cost did increase by $700 and change...but from my own experience with generative work, this should be a lot smoother to operate, has some sonic capability improvements, and has a cleaner signal flow, all of which you want for that sort of thing. It might not be as useful an exercise since quite a bit of this was determined in hardware already...but I think there's enough improvement here that you might want to consider some of the alterations.