Category: MyRack

I got this filter from a friend of mine. He just send the pcb’s and panels and a link for the bom. As we where both building it we found it had some error’s. After he emailed Cagey we discoverd he accidentally uploaded the old files and our board where made based on that. Knowing what the problems where we finally could build it. I was quite interested in this filter. It uses a chip that not many filters use and is used in some great sounding machines like the Synton Syrinx and Crumar Spirit. The filter it self is quite nice. It doesn’t go into that oscillation mode on resonance. I would even call it quite calm, smooth and subtle. But that can be very nice sometimes.

It inspired me to have a better look at the chip used in this baby and make my own filter. I’m waiting on the pcb’s to arrive so maybe more on that.

https://kg.kg/cem3350-eurorack-filter/

Difficulty to build: Medium/Hard

Well oh well this is a special one. It’s also still in the prototyping fase. The module is a random acid generator and can (also) be used to create basslines. I’m testing this module out and want to thank Budgie for sending me one of these. I still want to do a full build report and review on it. Hopefully I can find the time for that somewhere.

Some explanation and demo can be found here

https://youtu.be/q4RDT-eKImU (by Budgie Synths)

Difficulty to build: Medium, no manual yet (prototype)

I got this filter from a fellow designer. It’s still in the prototype fase and I’m one of the lucky ones to test it. It’s a really nice filter. It resemble the MS-20 filter when listening to it. It have to double check with Budgie is it’s based on that design. It has low pass, band pass and high pass output’s. It can overdrive the resonance quite a lot. I like this one and when it hits the stores be sure to check it out. Don’t know exactly why it’s call Greenfinch but I think Budgie names it’s modules after birds.

Difficulty to build: Medium, no manual yet (prototype)

I bought this LFO mainly because of the reset function. I really enjoy using this LFO in my patches. I think it’s one of the best LFO out there, but hey I’m a MFB fanboy. The switch can be used to trigger the second LFO from the first one. The options this LFO got are missing on a lot of other LFO’s

https://youtu.be/OEa18OEaMfI (not my video but some patch tips with this LFO)

Difficulty to build: No DIY. Bought it

I like the sound of this one. It sometimes remind me of the 303 acid sound. It isn’t quite the same but it can lean to that specific sound. It was a small disaster to build. Lot’s of parts and I just don’t like it when the resitors are standing up. But just because of the sound I might build a second one. This module is open source and on github.

https://youtu.be/gA3WmvU1QJ8 (not my video)

https://github.com/erica-synths/diy-eurorack

Difficulty to build: Hard

Another filter from haraldswerk. This time a 36db one that can also be used as a sine VCO when plugged in from the 12db output into the second input. I haven’t used it much I just finished calibrating the bad boy. Have to update this post when I have played a bit more with it.

https://www.haraldswerk.de/Filter/36dB_Euro/VCF_36dB_Euro.html

Difficulty to build: Hard

I mainly use this module to tune my VCO’s. But paired with the precision adder it can also be use to transpose pitch. This module outputs octaves and semi tones. I had to do a little trick to make the headers fit. Maybe will do a build report on this one, so others can do the same cause I still don’t know how the header should fit without this trick.

Difficulty to build: Easy /Medium

I use this module to transpose pitch in some of my patches. But the description on Haraldswerks site says it can do a lot more. Maybe I have to play with it a little more just to test all of that out. I does what the name says it will do, move CV. Harald also release a Quad version to pair with the LFO and VCA. Didn’t build that one yet.

https://www.haraldswerk.de/Utilities/CV_Mover_Euro/CV_Mover_Euro.html
https://www.haraldswerk.de/Utilities/Quad_CV_Mover/Quad_CV_Mover.html

Difficulty to build: Easy

I build two of these. I changed the capacitor values on one of my build to give me a really slow LFO. I like these LFO’s they end up in a lot of my patches. The module itself is a bit big a takes up quite some space but you never have to switch between outputs like on most other LFO’s where a switch sets the waveform. The waveforms are available straight on the panel. The led’s give a good indication if the LFO is on the negative or the positive side and therefor if it’s going slow or fast.

build report here: https://www.quinie.nl/building-quad-lfo-by-haraldswerk-de/
and for the gerbers for the panel: https://www.quinie.nl/panel-haraldswerks-quad-lfo/

https://www.haraldswerk.de/LFO/Quad_LFO/Quad_LFO.html

Difficulty to build : Hard

You can never have enough VCA’s in your rack and this module has four of them. I still find this one a bit tricky to calibrate. Maybe I should take it out of my rack and give it a second or third try to calibrate. I don’t use them as much as my other VCA’s (don’t know why). Depending on the build it can be DC or AC coupled. I believe mine is DC but have to double check that. I made the panel gerbers from Haraldswerks FPD file that you can find on his website

For the panel file: https://www.quinie.nl/panel-haraldswerks-quad-vca/

https://www.haraldswerk.de/VCA/Quad_VCA/Quad_VCA.html

Difficulty to build : Hard