Tag: modular synth

Reverse Landfill Veratrum – DIY Build

Reverse Landfill Veratrum - DIY Build

Reverse Landfill’s modules never cease to amaze us and lo and behold they have done it again with the Veratrum; a noise and texture voice with brutal chaos. What is it you ask?

The Veratrum was a intership project between Reverse Landfill‘s own Martijn Verhallen and Freek / FRUKU. It took over 4 months to develop and in the end the Veratrum Noise Module was born. 

Veratrum contains 5 oscillators that go through a “pseudo” ring modulator and this in turn creates chaotic drones and swarming sounds. It has 2 audio outputs (square swarm & filtered) and one LFO output which when used at really low frequencies, blips and clicks seemingly are on the attack. 

Reverse Landfill Logo
Completed Front - Veratrum

The Reverse Landfill Veratrum eurorack module also features two touch pads that control the volume and pitch of two oscillators. Its unique look and cryptic control surface mirror that of its brethren modules produced by Reverse Landfill. Now let’s get on with the build shall we?

Links and more links…

Below are a series of links that have been provided by Reverse Landfill to help assist with the use, building and buying of the Veratrum.

Of course, we are here for you as well if you have any questions while building the module. Just hit us up on our Contact Page.


Zlob Modular Diode Chaos – DIY Build

Zlob Modular Diode Chaos - DIY Build

Tailgating off the Triple Chaos, we decided to pick up the Zlob Modular Diode Chaos due to the uniqueness of this module. The Diode Chaos is a 3HP analog low frequency voltage generator that is packed full of chaos. The module is based on a circuit from a paper called “A Simple Chaotic Circuit With Light Emitting Diode” written by Volos, Wang, Jafari and Kapitanik. 

What makes this module really unique is its “Trig Out”. The trigger is not a standard “trigger out” in that it has an exponential rise and fall to its peak. This means that it cannot trigger every module out there because some modules are looking for a perfectly squared off edge in their rise. 

An example of this is if you pair the Diode Chaos with Maths. Maths cannot handle the trigger coming into the Trig In, but it can accept the signal into its Gate In. Unusual? Yeah, we thought so too. It was time to get on with the build!

About the kit ...

Zlob Modular provides some really great documentation via their website which is always a plus when taking on a new build. The components were also individually labeled which shows how much time the company puts into their product. This also made it easy to sort things out when cracking the kit open.  

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Waveform Magazine PT2399 Delay – DIY Build

Waveform Magazine Project 1 - PT2399 Delay Module - DIY Build

When it was announced that there would be a magazine dedicated to modular synthesis, you can imagine the feedback from the modular community. Waveform Magazine was born in the summer of 2019 and upon its release it created a following.

To much of everyones surprise, not only was this a magazine that reviewed modules, manufacturers, artists, etc.. it also contained its very own DIY projects.

Project #1 was a upcycled karaoke reverb PCB that would be transformed into a eurorack delay. Otherwise known as the PT2399 Delay or Waveform Magazine Project #1, this little 5HP module inspired a whole new group of DIYers due to its new found glory of being published.

Waveform Magazine PT2399 Delay Module

PT23.. what?

At the heart of Waveform Magazine Project #1 is the PT2399 chip. The PT2399 is a CMOS echo/delay processor developed by Princeton Technology Corp.

This digital chip includes an ADC (Analog to Digital converter), 44Kb of RAM to store the samples and a DAC (Digital to Analog converter). This chip was created as a simple solution to add delay/reverb/echo to karaokes and set-up entertainment systems. Pretty rad eh?

The PT2399 is readily available and has a minimum delay of 30ms and a maximum of 340ms (that could be extended up to 1 second at the expense of sound quality) which makes it perfect for delay, echo and reverb effects.

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Waveform Magazine Switchenator – DIY Build

Waveform Magazine Project 3 - The Switchenator - DIY Build

Front Completed Switchenator

Issue 3 of Waveform Magazine (Winter 2020) is chock full of reviews, interviews, gear and even a new DIY Project. For their third DIY project, Waveform have provided us with another utility module that requires zero power and allows attenuation and signal toggling on the fly.

Waveform Magazine Project 3 is known as the one and only Switchenator!

We were thankful to take this build on and see what this module was all about!

To sum it up, the Switchenator is a dual passive attenuator and dual switch for Eurorack systems…. and it’s a little 4HP beast.

What’s this Waveform Magazine again?

Waveform logo yellow

As previously mentioned in our Gateway Oscilloscope write up, Waveform Magazine is the first and only publication dedicated to modular synths. With that being said, we were stoked to receive the Winter 2020 edition of Waveform earlier this month partially due to all of the new gear reviews and industry news that they provide.

One of our favorite features is interviews with the modular synth manufacturers. It’s really cool to get to read about their journeys into modular synthesis and how they started their businesses. The interviews are so well written, it almost makes it feel like you know the owner of the modular company upon completing the article.

Note: In case you missed the opportunity to get the first three issues of Waveform, you can still pick them up over at the Waveform site (which we HIGHLY recommend you do!)


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