Category: Media

Synthrotek Octave Fuzz – Time Lapse Build

Synthrotek Octave Fuzz - Time Lapse Build

For our first build of 2019, we take on the Synthrotek Octave Fuzz module.  You ask why we chose this module? What attracted us to needing this module in our rack?  Well the answer is simple… that 1970’s fuzz sound that you rarely hear in music these days.

Combined with the ability to trim the octave and gain on the back of the module opens up a whole new slew of sounds. The 70s never sounded so good in a module!  Onto the build … 

The Synthrotek Ocatve Fuzz is a relatively moderate build as long as you have a steady hand and patience while reading the BOM. Synthrotek has always done a great job with the BOM and their assembly guides, and the Octave Fuzz is no different.  The tricky part of this build is that you need to populate two boards.  This can quickly become a mess if you don’t have something to organize all of the parts in or if you aren’t paying attention to the BOM. Just remember, if it gets too overwhelming, simply focus on one board at a time and separate parts accordingly prior to assembly.  

As you can see from the video, we decided to work on both boards simultaneously, so that we do not lose track of where the resistors, diodes and capacitors go. The only thing differentiating which board your components go on is an asterisk on the BOM… (ie. You can lose track quickly if you aren’t paying attention)

When it was all complete, we also swapped out the classic white Davies knobs with some cool clear Davies knobs to give our module that individual look it needed. We popped it into our rack, patched it in and turned up the 70s fuzz of nostalgia. 

Check out the images of the build below, followed by the the Octave Fuzz Module Specifics. 

Octave Fuzz Build Gallery

Synthrotek Octave Fuzz Specifications:

Module Description:

– Scoop switch for a ‘scooped’ mid-range, or to have a midrange boost.

– CV input over the Expander part of the circuit (similar to gain)

– True wet/dry mix. – 35mm (1 3/8″) Deep

– Current Draw: 24mA @ -12v 32mA @ +12v 0mA @ +5v

Module Dimensions:

Height – 3U

Width – 6HP

Featured Music: Scientist (Drumcell Remix)

Artist: SONOIO

Album: NON RED

Released: 2011

Synthrotek Octave Fuzz Audio Sample

If you have any questions about the Synthrotek Octave Fuzz build, please feel free to contact us.  If you would like to purchase the Octave Fuzz kit, please click HERE to be redirected to Synthrotek where you can complete the purchase.

~ f i N


Time Lapse Build: Synthrotek DS-M

Synthrotek Drum Synth Module: DS-M Time Lapse Build

Play Video

We take on the Synthrotek Drum Synth Module otherwise known as the DS-M in our latest Eurorack Modular Build. The DS-M is a full featured drum synth that can emulate virtually any drum sound with a twist of a few knobs.  It is a complex, modifiable analog drum synth loosely based on the Coron DS-8 according to the Synthrotek website.  It a relatively moderate build with stand up resistors and intricate soldering points needed.  We recommend if you are new to soldering, to start out with something other then this.  

During our build, we made sure to double check each resistor prior to populating the board.  As usual, diodes and caps are directional based whereas the resistors are not.  This 8hp module packs a big punch just like its predecessor the DS-8.  Changes to the original DS-8 include the following:

  • VCA-like trigger input (more voltage = louder output)
  • Trimmer-adjustable attack
  • LED trigger indicator
  • 1v/o tracking (C0-C4)
  • Triangle core oscillator
  • Additional noise color switch setting (3 settings instead of 2)
  • More distinct noise timbres
  • Louder, improved noise circuit
  • Really LOW bass frequencies 
  • Total range ~4Hz to 2.6kHz

As well as being an amazing little drum synth, this module is also a fully functional monophonic synth that has the following features:

  • 1v/o tracking (C0-C4) 
  • Adjustable attack and decay envelope over the VCA 
  • Built-in LFO circuit
  • Sweep circuit
  • Noise circuit

You can plug in your CV or keyboard directly from your MIDI-2-CV converter and you are ready to go!  You can also use it stand alone as a monophonic synth if you choose to do so.  

DS-M Features:

  • Width: 8hp
  • Depth: 1.75″ (44mm)
  • Power connection: 10 Pin Keyed Eurorack
  • Current Draw: +12V: 20mA, -12V: 10mA (5V not used)

Hint:  The magic really happens when you connect 2x DS-M’s together…. 

To purchase the fully assembled DS-M, click here: http://store.synthrotek.com/DS-M_Analog_Drum_Synth_Module?Affid=15

If you would like to purchase the full DIY kit of the DS-M, click here: http://store.synthrotek.com/DS-M_Analog_Drum_Synth_Module_DIY_Kit?Affid=15

If you just want to purchase the DS-M panel and PCB combo, check out this link: http://store.synthrotek.com/DS-M_Analog_Drum_Synth_Module_PCB_and_Panel_Combo?Affid=15

Video Details:

Music: Deep_Purple

Artist: maKo

Album: oRigiNs

Released: 2001

Remastered: 2018

Genre: Dance/electronic

Producer: maKo


Spring is here and so are the new products!

We wanted to take a few minutes and give you some updates on whats been going on at fiN Studios. 

Coming in April:

  • New logo T-shirts in white, black and red. 
  • More modular building
  • More 3D printing videos 

Coming in May:

  • 2 exclusive products coming to the store
  • Album Release:  maKo ~ oRigiNs (remastered 2018) 

Stay tuned and make sure to follow us on our social media pages!

~ f i N


The Shop is now LIVE! – Modular LED Plugs are available!

Check out our new shop page and our exclusive handcrafted LED Modular Light plugs.  

* Please note we are in the process of a layout redesign with the shop … but everything is active and secure.  ~

LED Modular Light Plugs


Random Photo – maKo

From the vaults….


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