BOB's LADDER based on moogs ladder filter built on simple perf board

Here I make a ladder filter for the modular system.
this is based on Bob Moogs ladder filter and redesigned updated by yusynth.net . I have made a few small variations but the main design with circuit diagrams etc can be downloaded from yusynth.net.
Instead of making a circuit board i decided to make this one on perfboard just to show that it can easily be made by anybody without having to cnc or etch a board yourself.
the music track within this video "Skylab" was composed and performed by: markus fuller - Jason Lee & Dan Ward ©2018.

[@LOOKMUMNOCOMPUTER]

aha! i came to your channel earlier to see if you bought out a new vid! and BOOM here it is :D

[@markusfuller]

Hi Sam yes sorry i have been working and could not get time to make a video up until now.

[@DarraghRedmond]

Goodness me mark you haven died and gone to Synth heaven after all. Good job 👍🏽 Keep em coming.

[@DarraghRedmond]

Opps Didn’t mean to reply on this chain ,, Ah well , Props to both you brighton legends x

[@markusfuller]

Thanks Sam. ps I am in the middle of building a website and placed you in my links section. I hope the image I used is OK. if not let me know and I will change it.

[@Erstlaub]

Always a delight to watch a new video from you sir. Holy cow does that ladder filter sound gorgeous! It's a real treat when we get to see and hear you playing with your MU. Thanks.

[@nozzlegoblin1]

I've built ten of his modules so far, and they are absolutely amazing!

[@snolan1990]

Trevor Weber you can go on holiday with all the cash you have saved by doing it yourself!

[@JakobHaq]

It's such a pleasure watching these modular featured videos Markus. Very inspiring and it sounded great too. 👊🏼

[@markusfuller]

Thank You Jakob . more on the way, I think I will make the Steiner-parker filter for it next. that should be interesting.

[@robertsyrett1992]

These modular build videos are AMAZING!!!!!

[@markusfuller]

Many thanks Robert

[@anodyneinstitute]

Absolutely entranced by the piece at the end.

[@markusfuller]

sorry I got so carried away that the camera card filled up and stopped recording, i did get into some nice Bass parts but it was not filmed.

[@krmelectronics]

There are so many good tips in this video, that I lost count.

[@markusfuller]

Thank you synthesizer Keith. I'm a big fan of your synth videos you have lots of great advice and knowledge that you also share. many thanks from Markus

[@aaroncarter8845]

Man, this channel is great, all I wanted was a less janky version of making synths than Look Mum No Computer, and here we are!

[@danielf.6162]

This is such an awesome channel- I wish someone (like Moog) would sponsor you. great video as always, Markus!

[@markusfuller]

That would be awesome, just getting some sponsorship to push me along without worrying about having to work to pay bills would give me more time to make things.

[@MarcWeertsMusic]

Very cool build! Also loved the demo at the end!

[@markusfuller]

Thank Marc

[@Digiloog]

Again a great vid Marcus. I really enjoyed it. Even as the music. Don’t wait to long to share it. Keep up the good work 👍🏻

[@markusfuller]

Thank You I will post the music soon I hope.

[@anoopsahal1202]

Excellent posting once again. Historically intriguing , technically challenging and with an out come that some viewers could practically follow up on. I’ve known about Yusynth for some years and attempting some of the builds has been a dream but so has becoming a pilot. For a novice the difficulty is where to go if nothing happens when the build does not work. Even a smoking component gives a clue but dead on completion is very difficult and actually stops me from attempting a build. Any way hope you are well , love the Flymo hair dryer effect on the back of your head , I may try it myself.

[@markusfuller]

Ha I think I was having a bad hair day. looks like I have been lying in bed all day. trouble is I cannot see it until its too late.

[@DoctorBlankenstein]

I built this and added my Illumiringer circuit to it. It's controllable by knob, voltage, light and touch. I had Herb Deutsch sign it for me. It's one of my most prized possessions. I should make a video about it.

[@markusfuller]

DoctorBlankenstein That would make an interesting video, I would like to see that.

[@yusynthman]

Well done Markus. I like your videos they are always very instructive

[@markusfuller]

Thank You very much. the real credit belongs to you for your generous gift of sharing your work with us all. I only found your website a few days ago and am thinking about making the steiner filter next. I have been watching some of your wonderful video's "great music" I also own the matrixbrute and Crumar Multiman-s .

[@markusfuller]

Thank You, I have placed your website into the links section of my new website. I hope the image I used is OK, if not let me know and I will change it.

[@yusynthman]

I cannot find your new website... What is the url ?

[@markusfuller]

yusynthman it is www.markusfuller.com I only started making it up yesterday so there is not a lot on there at the moment.

[@yusynthman]

I checked and it is perfecty OK, if you are interested in more shared designs check this synthr.yusynth.net/ (it is in french but if you click on the british flag you'll get a translation) There you'll find some other interesting designs by Rémy Wasselin.

[@Geopholus]

It is actually a hell of a lot easier to etch boards than You think. Especially with the pattern is already done for You. You can coat the board with a mixture of Potassium dichromate, and gum arabic, and copper sulfate to make it more sensitive to UV. Mostly gum arabic, (like 80 %) and a few grams of Potassium Dichromate, and perhaps a bit more copper sulfate, to make a quart. After spreading that on the board and letting it dry in the dark,.. Lay it out in the sun with the mask over it, for ten - twenty minutes or so (experiment first), and then wash off the part that was hidden in the shadows that is still water soluble. You etch in Ferrous chloride (witch is nasty but not nitric acid), and by placing about 6 Volts DC, on the board, and a carbon rod in the solution, you can increase the rate of etch, and also use the solution over and over. i can't remember witch lead connects to the solution, but basically that is the side where copper is going into solution , so I think that's the negative side. After etching, wash off the board thoroughly, and then let it soak over night in water with a little baking soda. It is so much easier not to have to wire each board over and over. I believe that guy You mentioned also sells pre etched boards and they don't seem to be too expensive. The problem with the rat shack type boards or the Chinese equivalent, is that the copper bits are so tiny, that they easily delaminate, or fall off the board with the temperature of soldering, especially when correcting a mistake. You can also make a silk screen the same way i just mentioned above to make lots of the same circuit. Remember the dark parts of the pattern on the plastic sheet are the parts that get washed away, when it is on the board, and the opposite when You are making a silk screen. To make a positive from a negative You are going to have to do some graphics image reversal on Your computer.

[@GrantCarvalho]

You're a baddass in my book, Markus.

[@markusfuller]

Thanks Grant :-)

[@genuinefreewilly5706]

great stuff as usual! Jeez I think I have very same metronome, you have in the back of your tardis. I always had it sitting on my piano never really used it, wind up thingy, gave me bad memories of my first piano teacher I suppose, I still like it, the shape I have misplaced the cover somewhere, it has funny little latch at the top, I recognize the embossed metal diamond. Some company must have made a quite a few of those mechanical nomes

[@naoyukisasanami]

Watch out! Self employed & Do it yourself is the key to keep your hair. i also Self employed freelance and own enough hair:) Less stress life

[@MegaKid303]

High Mark. I'm the guy who mentioned Yve Uson to you not so long ago. Anyway, I am just about to get from Oshpark open source pcb manufacturer a wonderfull little circuit based on the Ian Fritz' transistor matcher. There are 2 main, (well 3, if you consider Bob Moogs method in the Minimoog service manual) of matching transistors that seem to be the rule of thumb within the synth diy community. One is Ray Wilsons method which can be found under the side menu of "Transistor Matching 101" from his website "Music From Outer Space". Anyone who is into synth diy would of come across his font of knowledge at some point or other and if not and anyone who is starting out like myself into the foray of trying to fathom schematics etc, you should check out the web site. Sadly he passed away a few years ago now and no doubt has left many broken hearts. Typically, as is the case with me, I always arrive late on the scene and have only relatively recently discovered the universe of possibilities of being able to create synthesizers that make the sounds we are all familiar with. Anyway, I digress and waffle on for ages not actually getting to the point. Ray has a schematic for creating a circuit to test NPN and PNP transistors which is briliant but I am just getting to the point where I can follow the signal path within a schematic but cant for the life of me translate that into a breadboard circuit or stripboard, whatever. Rays circuit measures accurately each transistor so one would obviously "match" the values. There is another circuit which is far les complicated and a damn site easier to build and use, (I say that even though I still cant lay down the plans in circuit form). Ian Frit's transistor matcher measures the difference between the two transistors and can be used in a way that a reference transistor is used as a base line to compare to or can be used to just obtain the reading of each one individually. This long winded dialogue started with me trying to say that I'm getting a couple sent to me from the pcb manufacturer some time towards the end of the month and was wondering as a little trade perhaps if we could correspond through email or something if you could tell me how you make your panels, as I'm wanting to make my modular in the MU format or Dotcom as its sometimes called. I want to make my own faceplates but the bending of the side bits I;m not sure how they are done. The Dotcom panels seem to have a slight curve to where they are bent that gives a lovely aesthetic look when two panels are side by side but I'd love to know how they are done, with a machine clearly, if you look closely you can see what I'm refering to. The aluminium sheet doesnt just have a straight square cut out of the four corners and then the sides just bent inwards, there is a little signature small curve and then is bent. I would still like to have a go at making my own panels. I'f they are no good I might just go MOTM or failing that by blank panels from Synthesizers.com or Moon Modular. Like I say I'll do a trade for some info on how you make your panels because you never did tell us how you made the panels just showing us your experiments with annodising and engraving and that was that. Perhaps you can help me read a schematic and then re-create it on a breadboard etc. I'm slowly learning this electronics lark but slowly being the operative word. Most transistors providing they are bought on a strip or ammo belt will be fairly the same. Synths tend to call for VBE to be matched, not always but most of the time. That Peak thing you have should read VBE I think. I'll show you the pcb layout if I can send you something to somewhere.

[@markusfuller]

Hello firstly Thank you as you did indeed point me in the direction of yusynth.net which is a gold mine of useful information. I made a previous video titled "Expanding the Moog Modular synthesizer & making the Attenuator" in it at about 5:08 I show the metal bending machine that I use to make the edges. this is a bit expensive about £200 but there are several vids on youtube showing how you can make a similar device with just 2 pieces of angle iron bolted to a desk. I simply bought the Clark version as it also cuts bends and rolls all in one machine and it was purchased for other work I do. as for Transistor matching I am simply using the Peak analyser DCA55 which gives several readings about the transistor under test including Base > emitter Vbe / test current / and Current gain Hfe / Ib test curent /Ic=leakage current / . though theres are several much cheaper versions now available on amazon that do the same job but not in a fancy box and some have even more tests built in. I just chose 3 sets of 2 that showed exactly the same values, and the filter unit sounded just right. back to the bending procedure. I normally cut the corner out before I bend the edges but it is always slightly messy so I have to use a diamond file to tidy the cut edge as best as i can, I cannot get that perfect looking edge as you get with Moog panels - it always has the home made look to the edges. if you want to round off the bend instead of a straight 90degree bend then you place a piece of scrap metal above and below the piece you want to bend and your piece the sandwich filling will have a rounder bend to it but it makes it 3 times harder to do if you have a manual machine like mine. Translating circuit to breadboard. well this just takes time and patience to do but you can use a program called Fritzing which is a free download and you can design a circuit onto a standard breadboard literally moving components back & forth until they fit, its a bit awkward to use as you have to dig through menu to choose capacitors transistors chips etc so they can be visualised in the correct size when you place them onto the breadboard. then you can go and check the schematic that it makes in the background, Its relatively new and i did try it but found i was taking too much time looking for components etc and the schematic was quite messy when visualised, however its a great program in many ways and i think they are only on Beta at the moment so should get better and easier to use. I personally without getting too big headed find it easier to do from my head only because i have been doing this for over forty five years though the easiest way is not to use stripboard or breadboard but instead use perfboard where all the holes have a ring of metal but no hole is connected to any other hole, that way you can match the circuit part for part then flip it over and start placing wire or solder across making tracks in the same pattern as the circuit board you are trying to make. I place a component then tick it on my printed image then when i make a connection from one component to the next I colour in the track on the printed circuit diagram i am working from. that way you can track as you go along and not miss a single thing.

[@MegaKid303]

Oh sorry I was not aware of this video, I thought I had seen all of your lessons. Brill I shall check it out, thanks again for all of your vids they are extremely informative and I have learnt a lot and it is infectious the passion you have for your work. I see that many people on youtube use perfboard to realise circuits and will have a go at doing it. Thanks again Keep up the good work

[@WesslansFilmprod]

Awesome work, Markus! / Daniel Fletcher of D.S. (a Swedish synthrock / synthpop group)

[@markusfuller]

Hey Daniel. :-) Im enjoying your music also.

[@WesslansFilmprod]

Thanks a lot mate :D D.

[@vegettoblue8705]

Really cool ! Thk you for sharing 🤘🏼

[@markusfuller]

Thank You

[@Johnsys359]

Yey! A new Markus video! was beginning to think you've forgot about your KZbin Subscribers.

[@markusfuller]

Sorry John, I have been so busy with other things that life throws at you that I just have not had a free day to get started on a video. things have settled down now so i should get back on track.

[@Johnsys359]

markusfuller I completely understand, just wanted you to know that your fans really do like you vids

[@seanhornibrook]

You are going to hate me for saying this, but: Voltage Controlled Emphasis. Love the panel design. Sounds great!

[@markusfuller]

did I say that ?. sorry. Yes its emphasis control but errr voltage controlled maybe not.

[@seanhornibrook]

lol No you didn't say it - I'm just saying - it is a very useful input / control. :)

[@random007nadir]

BTW: excellent music. Love it.

[@markusfuller]

Thanks Jonathan

[@ARBB1]

Great work

[@anoopsahal1202]

I assumed you would need a camera operator and someone from make up attending to you. The shots are always perfect , Bigclivedotcom seems to have a camera man I have seen him!

[@markusfuller]

I really wish I had someone to operate the camera or more importantly cut my hair. that way the videos could be better.

[@Erstlaub]

Naw, Big Clive just has his ipad/tablet mounted above his bench and that's why it's usually the same angle. He did do a video where he showed/talked about his setup I'm sure. His brother Ralphie who lives nearby (and has a very popular malt Whiskey channel) occasionally pops up in his videos though.

[@jarnoverhoeven3118]

Awesome build, and a very nice video! Note that apart from matching the transistors in the ladder (which is 5 pairs in total, if I recall correctly), Moog also specified the capacitors in the ladder to be within 1% of eachother (which is easiest done by just buying 20 caps and match them, rather than trying to find expensive styroflex caps). I myself did a PCB which also has the Minimoog discrete "dual" VCA, highly recommended!

[@markusfuller]

Hello I did check the caps and they were all pretty close in value. but yes the better the match the better the circuit.

[@jarnoverhoeven3118]

markusfuller , lots of nice vcfs to choose from Polivoks or Wasp if you want something nasty, 2044 (reissue!) or 3320 for a nice vcf. Great that the ic's for both of the latter ones are in production once more. Good luck with your channel!

[@hubaswift7640]

Yusynth is a great site! I've built this same filter, and while I do not own an original moog filter, I can say that it is nearly identical to the Synthesizers.com Q150. The main difference I noticed is a slight difference in the tone of the resonance when nearing self oscillation. I also highly recommend the Arp 4072 VCF. It's my favorite. The clock divider is also sweet. You can feed in audio rate signals and use the division to create chords out of a single tone.

[@yusynthman]

Nice trick with the Clock divider, up to now I was using it mainly with step sequencers, but using it as a chord generator is very neat !

[@markusfuller]

wow thats interesting to know, I think I shall certainly put that on my to-do list. Thank You

[@shawnlennon1947]

this is gold!

Nice! Well done!

[@markusfuller]

Thank you

[@debaserNYC]

excellent! would love to see a video of you matching transistors.

[@markusfuller]

Hi I basically use a peak analyser DCA55 that does most of the work for you and there are cheaper alternatives on amazon now.

[@EdEditz]

I build this on stripboard from the same schematics using all transistors, not with the CA3046 . It sounds amazing!

[@JamrockVybzTV]

Genius

[@hungryfireworkshop7906]

It might be nice to have a video on matching transistors....just a thought. I have been wanting to build something from yusynth for a while. GREAT WORK!

[@markusfuller]

Hi this info can be found here www.cgs.synth.net/modules/simple_transistor_matching.html

[@markusfuller]

or you can get a peak DCA55 that does most of the work for you. or theres cheaper alternatives on amazon now.

[@jrcryo]

nice wearing arturia (Grenoble) hoody and talking of Yusynth (Grenoble) design. Yves is the designer of miniBrute circuitry.

[@markusfuller]

Aha you spotted the connection :-)

[@MegaKid303]

Soundtronics sell ready matched transistors for the Yusynth range should anyone not know how to or cant be bothered to match there own, just thought I'd mention it for anyone interested. Heck by some Yusynth modules, that way he gets a cut to keep him going so he provide us with many more wonderfull bits of info.

[@Geopholus]

On the jacking system. it is a hell of a lot better to put all the jacks on the top or bottom, of each module, so the patch cords and jacks don't get in the way, when You are trying to use it. I would use RCA jacks as they use smaller plugs, are cheaper, and very robust.

[@incompetentlogistics]

Would it have been difficult to make an overdrive/feedback circuit in the filter module?

[@michaelbauers8800]

Archer, that's probably not around anymore with the demise of Rat Shack

[@ThomasShatter]

Maybe some MFOS module next? And as always great video.

[@markusfuller]

Hi Thomas. I will certainly keep on going as i have many things i want to make. i think i am going to need another box.

[@stonail665]

His Seven Segment Linear Envelope Generator is awesome. I built two, but I need another one.

[@MrDuncl]

How did you make the Front Panel ( at 7:36 ) ? Many years ago I built a copy of a Transcendent 2000, including etching the huge PCB and getting it working. However, I got stuck at the Front Panel text / legends stage and it remains unfinished.

[@NeuronalAxon]

FINISH IT!

[@lagunagfx]

Cool Yamaha QY300 sequence on the desk, Markus. Excellent video, as always :) Would this design work ok in +12/-12 eurorack power bus?

[@markusfuller]

Hi this design works on both eurorack and moog. the instructions tell you to change 3 resistors for the eurorack version and jump 2 resistors. my top box on the modular is set to eurorack power so the one I made is +12 -12 and it works fine.

[@markusfuller]

I forgot to add that the unit under the desk is a QY700

[@6581punk]

Yusynth did some of the work on the Minibrute?

[@michaelbauers8800]

yusynth has industry cred, if you will. I think he might have worked with Arturia for example

[@markusfuller]

Yes I think he is behind the arturia brutes. I only found his website a few days ago and his generosity of giving designs away is wonderful. i will make the steiner filter soon.

[@thebassdr3amyt791]

Excuse the question that laser model uses for plates? Will I use any type of laser cnc?

[@bartconinckx]

Hi Markus! Where did you get the Arturia shirt? I need one as I just bought the Matrixbrute ;-) In fact, they should have given me one for that ...

[@markusfuller]

Hi Bart I also got the matrixbrute (magnificent) I got the shirt at a modular meet in Brighton last year.

[@zanassopaolo4203]

markusfuller i

[@mikehydropneumatic2583]

Hi Markus, Moog filter is a bit mandatory isn't it? Got a Subsequent 37 and love it. Also got a Roland VP-03 and a question. My human voice and vocoder section only work when I got ensemble (chorus) on. The string section is not affected (no ensemble mode there). Via phones out everything works as it should (even without ensemble human voice and vocoder work propperly) but on the mains out it is as stated above. Any idea?

[@markusfuller]

Hi Mike. to be honest I looked at the VP-03 with interest (as i owned the VP-770 years ago) but I never got around to getting the VP-03 so do not know anything about it other than it has now been officially discontinued and production has ceased which means the value should start going up on them as it has with the JP-08. so sorry I cannot help you as I missed out on that boutique unit.

[@mikehydropneumatic2583]

Markus, Thanks for your reply. Am affraid I'll have it serviced (under warranty).

[@Psychlist1972]

Really enjoyed your backing track. Where can I hear more?

[@markusfuller]

Hi Pete. the music comes from our monday morning synth club. where Me & Jason lee (youtube organaut) and Dan Ward (from GAK audio) have been making music for almost 2 years in the hope of oneday releasing a CD. we have not even got a band name yet. but soon I hope to be able to release some tracks on soundcloud when they are completed. I cannot put it on yet as its a 3 way ownership and I need their approval. I have my own soundcloud (markusfuller) that i have put my own music on and set it as free to download and use by anyone but the music from the three of us is not available just yet.

[@Psychlist1972]

Well, I'd love to hear more from the group. Encourage them to release WIP tracks on Soundcloud or Bandcamp or something :) Don't let the perfect be the enemy of the good -- encourage them to release :)

[@Nervejam]

Is that a Streichfett I can hear?

[@markusfuller]

NerveJam.Com No its an old Crumar multiman-s

[@AdamTheAd-vanc3d]

Great great video . Markus nice to see your workflow on circuit building and your prototyping ideas/planning. As i was watching i was currently putting together an experiment filter prototype which is a classic clone .....but not Moog. Hopefully if i get it working ill post it on my channel. Anyway hope all is well in the world of Markus 👍👍 By the way do you have a link to where you got the prefboard with the ic isolation lanes from please ?

[@markusfuller]

Hi Adamski A. the perfboard i used for the filter was old stock from radio-shack many years ago. but the breadboard matched perfboard and others were all bought from amazon. the perfboard that is suppose to be a replica of a breadbord is not quite correct as it only has 4 connected down in a row instead of 5 that is standard on breadboards. still useful stuff though. anyhow its all on amazon. I look forward to watching your video when its completed.

[@AdamTheAd-vanc3d]

markusfuller . Thankyou for reply Markus. Ill have a hunt around for the prefboard on amazon. It would be really handy if i can find a prefboard that matches the breadboards i currently use which are the maplin Ad-01. P.s. Thankyou for subscribing to my channel :-) Best Adam

[@MegaKid303]

Have been following your stuff to Adamski A., great that we are Brits to. Check out Soundtronics.co.uk and there other site Makertronics.co.uk, Bitsbox.co.uk are cheap to way cheaper than Maplins. You'll find some good parts and they are cheap postage also. You must have one hell of a breadboard collection. I'm just getting into this electronics business and its fascinating, I'm just about to finish a x0xb0x and want to build an MU or Dotcom format but if the panels prove too difficult to make it might be MOTM. Perhaps you could give me some pointers if I could correspond with you if you wouldnt mind. Perhaps you could have one of my transistor matching circuits. Soundtronics sell matched pairs for around £3.50 but sell a hobby bag of 50 for a quid so its a no brainer youll find at least a couple of sets within them. It will soon pay for its self, the pcb for the matching circuit was £13.00 from America for 3 pcbs to be made and shipped to me, Oshpark is an amazing facility for making prototypes and finished boards for that matter for a really cheap price I think anyway. Let me know if we could keep in touch and if you have the time etc give me some tips to get me up to speed. When I watch your videos I can just about understand the signal flow of a schematic but cannot see how that can become a circuit, its still in the giberish stage for me at the mo but I'm trying to learn. Being able to place components onto a pcb and solder them is one thing but to understand what does what and what happens after the signal has passed through an IC or Op amp etc is another. That is what I want to know, to understand fully how a elctrical signals effect things to make sound is fascinating to me but like all things you have to learn as you go along, I just wish I could learn a bit quicker. anyway I'm enjoying the journey of discovery.

[@AdamTheAd-vanc3d]

the navigator Thanks for your tips, pointers and links ill definitly consider those suggested sites in the future. Haha yes i cant solder to save my life , maybe ill pass a big soldering job your way once ive got the pcbs done thou (still trying to get my head Kicad). Anyways yeah i wish i could break down the technical lingo into more layman terms , but me myself im still on a learning journey. I have only got into this jusg under 2yrs on and off and i have no electronics background. Anyway always feel free to post questions on my channel , no matter how small :-)

[@raulacevedo-esteves9493]

What if I want make it a pedal to use it with the output of a synth? What additions / modifications would be needed?

[@user-ew5xx2cc8k]

markus please tell me what additionnal straps i need for eurorack version ?

[@ScottFromCanada]

So does it actually sound like a minimoog filter? Have you done any standard minimoog bass type sounds with it?

[@markusfuller]

Hi Scott. sorry i got so carried away that the film eventually ran out on the camera but the Bass sounded wonderful though I cannot honestly say it sounded 100% like the minimoog filter. but it sure did sound good in its own right.

[@lorenzosolerfuentes8209]

Hello Markus! How are you doing? Great video,thanks! Am i wrong or is there a JMJ signature in your modular? Have a nice day!

[@markusfuller]

Hi Lorenzo. yes thats JMJs signature. I went to see him in concert and had a vip ticket so i got to meet him and I took that panel with me so he could sign it.

[@alancurrall]

Great stuff, Marcus! Where did you say you got the designs for this? ;-)

[@markusfuller]

Hi Alan they are all on yusynth.net theres lots more great things on there besides this, i'm already working on the next project.

[@complicated_AK74]

I might be wrong but i think his steinerparker filter is the same as the one in the Arturia brutes

[@yusynthman]

The brutes' filter is directly based on my adaptation of the Steiner filter, however it has evolved between the Mini, Micro brutes and the MatrixBrute.

[@markusfuller]

I am not absolutely sure but I think I have read somewhere that he is involved with the design of some things within arturias brutes. i have the matrixbrute and absolutely love it.

[@QrchackOfficial]

Is the filter somehow loading the oscillators and making this awful pitch drift or was it an intentional LFO into the VCO's CV input?

[@ewajustka]

can you make diode ladder filter ???

[@gnarlysoundscapes7210]

2:11 How in the world did you accomplish that? I can't even do a simple circuit on proto board without it becoming a tangled up web of wires on the bottom.

[@els1f]

What is that sequencer-looking thing in front of your keyboard? The black and white one with those really satisfying looking buttons...😲😄

[@markusfuller]

Hi Elsif that is my old Yamaha QY700 sequencer. they are still amazing little tools even by todays standards. 32 midi channels built in sounds and floppy drive to store a whopping 20 songs onto.

[@els1f]

Wow, that musical keyboard layout looks so modern! Or, I guess more like modern imitating old-school :)

[@Pvaeerener]

Hey... what kind of machine is that you're using beginning at 7:31? :o

[@flaconsius]

Really nice Video. Where can we find the Schematic and Layouts Documents?

[@markusfuller]

Hello I think it was a long time ago but they may still be on my old website markusfuller.com i have not updated it for a long time but i guess they should be there somewhere.

[@flaconsius]

@@markusfuller Ok, thank you very much.

[@sidsuperstar]

Hey Markus, where I can get one of those perfboard...it seems that they suit 500's series...Im just developing a module and need something just like yours...pls let me know Sid

[@michaelbauers8800]

try ebay, I saw some old perf boards for sale there

[@markusfuller]

Hi Sid they are oldstock from Radio-Shack many years ago and i doubt they still make them. although theres several versions of perfboard available on amazon. the smaller green one i showed in the video came in a box of 20 different sized cards from amazon but occasionally you can find the larger ones that you can attach edge connectors to.

[@sidsuperstar]

Hey man, thanks for such prompt answer, it is highly appreciated. I will take a look on amazon. thanks again for your reply and for posting good stuff here...Sid

[@user-ew5xx2cc8k]

what does he mean when he wrote : Do not forget to solder the two straps, one is located beneath U2 , can anyone help me understand what it means ?

[@matthiaswilhelm9813]

Where can I become the circuit Diagramm for selfbuilding the Filter?

[@cbmsysmobile]

Why is there a sticker on the PC monitor that says "This way up" the wrong way?

[@markusfuller]

cbmsysmobile Thats just my silly sense of humour.

[@annother3350]

Would have been nice to hear the filter on some lower register sounds

[@MegaKid303]

Markus Just another side note, you should check out Tony Allgoods site. Oakleysound.com for some more diy BRILLIANT modules, the format is MOTM but easily converted to synthesizers.com format. He has a guy called Krisp who makes the modules ready made as MOTM or Dotcom. Dave Browns ModularSynthesis.com is an absolute treasure trove of deatailed information you would love as he goes really into depth about the way different modules are made with very good photos to accompany them. Analognotes.com is a kind of reference library for other links to usefull bits of info, manufactureers of modules and other bits and bobs. If I can remember some more I'll tell you.

[@PeterWalkerHP16c]

You're kidding. Like there's not a gazillion custom board makers who'll spin that up for less than $100.

[@michaelbauers8800]

You actually own a LASER etcher? Wow

[@markusfuller]

Hi Michael, yes its a fiber laser, cost a lot but hopefully in the long run it may pay itself back before i die of old age. lol

[@AlexandrShursoma]

Is it QY700 on your desk?

[@markusfuller]

Yes my old QY700. I love that old beast with floppy disks :-)

[@AlexandrShursoma]

Love this machine, sold mine because I don't have enough time to program hardware. Miss it so much.

[@Gujenax]

To make transfering from breadboard easier you can use a PCB that is identical to breadboards and make use of the markings (1,2,3,4, I, J ,G) etc. www.adafruit.com/product/571

[@beatles7798]

UUULLLLAAAAA ;)

[@markusfuller]

beatles7798 uuuuullllaahhh as in the tripods from war of the worlds ?.

[@beatles7798]

markusfuller Yes! Your desktop!

[@DAVIDGREGORYKERR]

Could this not be done in maths using a ADC, DSP, EEPROM and DAC plus a clock generator might be more elegant.

[@michaelbauers8800]

Of course filters can be done digitally. And have been done digitally in many many synths. Most Yamaha synthesizers throughout time are 100% digital ( Yamaha went digital with the DX7 and never looked back.) And the ones I have used, all have digital filters. It's 2017 though, and analog has had a bit of a renaissance. Maybe more than a bit. Modular is back. Analog is back. Digital is often viewed as silly because a lot of people won't pay big bucks for a digital synth when they can do it in software for free, or at least a lot cheaper than some of the digital synths. Personally I prefer hardware synths and usually digital.

[@markusfuller]

Yes it could be done digitally and I have never been one to stand either side of the fence when it comes to digital v analog. I have just gotten into teensy 3.2 3.6 and hope to learn something useful for making synth & effects for future video's. but I need more days in the week to try and teach my old brain something new.

[@MrDuncl]

Or using an Ipad that already incorporates those things (as Moog themselves did with Animoog). However, real knobs and the vagaries of Analogue are why people still like it.

[@annother3350]

You'd have thought someone would have invented a conductive marker by now, like the silver pens you get in Clintons...

[@bartconinckx]

isn't it "3 sets of 2" in stead of "2 sets of 3"?

[@markusfuller]

yes its 3 sets of 2 , matched pairs. why did I say 2 sets of 3 ?. sorry about that.

[@anoopsahal1202]

What is the website again?

[@jrcryo]

yusynth.net/index_en.php

[@markusfuller]

yusynth.net