Tag: review

Sound Study KONTACT Mic – DIY Build

Sound Study KONTACT Mic - DIY Build

Stylized KONTACT Mic

For this build, we take on the Sound Study Kontact Mic Eurorack module. This 4HP module is a unique way to interact with your system on multiple levels. It’s creative applications are endless: finger percussion/rubbing/scratching, guitar input (works surprisingly well with just a little lo-fi crunch), acoustic sources to CV, etc.

While this module has been out awhile now, we wanted to pick up another mic source to add to our racks. The modules rad skull design along with its small footprint made it the perfect candidate!

Study what? Sound?

Sound Study Modular only produces a few modules or stand alone utilities. Along with the Kontact Mic, they are responsible for the MIDI 2 CV (stand alone or eurorack format) which we also use in our racks. Their PCBs and panels are solid and are black with silver accents.

As the MIDI 2 CV is a clone of the famous CVPAL, the Sound Study Kontact Mic is a clone of the MTM Mikrophonie. With that being said, we have both of Sound Study’s modules and we wouldn’t leave home without them!

Enough of the descriptions, let’s get onto the build


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!)


Synthrotek DIRT – DIY Build

Synthrotek DIRT Eurorack Module - DIY Build

Completed DIRT Module
Completed DIRT Module

A classic Synthrotek filter, the DIRT is a 4HP module that is a necessity in any modular system. We actually have two of these and forgot to do a build video for the first… so guess what we did? You got it, a time lapse build of our second little module with grit.

What is the Synthrotek DIRT? It is described as a low-pass filter or effect module for eurorack modular systems. It has three knobs all which coinside with different variables of tone/sound. It can be used for filtering, ring mod effects, wave shaping and even harmonic distortion (which you can hear in our audio samples below).

Let’s get on with the build shall we?

How hard was the build?

The Synthrotek DIRT is a pretty simple build actually. It took about an hour to complete with a few stops along the way to change the tunes and grab some knobs for customization. 

One thing you want to make sure to pay attention to is the polarity of the caps (as usual) and the values of the potentiometers. There are only three pots, but all three have different values. The nice thing is that Synthrotek provides a great assembly guide and packed BOM for your reference. When referring to the assembly instructions, you will find that there are actually three different versions of the Synthrotek DIRT. A 9V standalone version (for pedals) and 2 eurorack versions are available. (At the time of this review, PCB version 2.2 is the current version). 


MIXIV By Synthrotek – DIY Build

Synthrotek MIXIV - Eurorack Modular DIY

MIXIV Completed Front

As February came around, we were pondering Eurorack mixing and how to achieve the best possible mix of either CV (control voltage) or audio. We had always used mixers outside of the racks, but we wanted something more portable.

The gang over at Synthrotek had just the released their first SMD module and it was right up our alley. The 4HP MIXIV by Synthrotek is in its simplest form is DC coupled and can mix audio and CV signals with the quick slider of a knob.

Prior to the MIXIV (pronounced Mix 4) build, we wanted to get the close up view and picked up a digital microscope in order to “see” what we were doing more precisely. This also gave us the chance to record some sweet videos to post in our time lapse build. You can check it out down below.


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