Synthrotek DIRT Filter Now Available

Completed & kit form available from synthrotek.com.

video posted here.

"DIRT is our new 4HP low-pass filter / effect for the Eurorack modular synth platform.

Inspired by one of our favorite 'noisy' filters, the DIRT is an unapologetic filter / effect that produces interesting and unique effects via the Bias knob, accessible from the front panel.

It's not a traditional filter; it's an effects module with filtering, ring mod effects, wave shaping and even outright brutal harmonic distortion.

DIRT likes to square things up a bit, so throw in a triangle, sawtooth, sine or other wave forms for different style effects. Even plugging a guitar (using an external amplification module) into the DIRT produces some great sounds and heavy distortion.

Controls:
- CUTOFF = Cutoff Frequency
- RESONANCE = Increase the Q!
- BIAS = Set the bias correctly or not, the choice is yours

Inputs/Outputs:
- CUTOFF CV IN = Voltage range changes depending on where CUTOFF knob is positioned. External attenuation will be needed for fine modulation.
- AUDIO IN = Audio Input
- AUDIO OUT = Audio Output

Other info:
- 4HP
- Power consumption: >1mA"

CLICK FOR MORE »

Synthrotek Dirt Filter Demo and Build Eurorack Distortion effect

Published on Oct 24, 2014 Flux302 of Fluxwithit.com

"http://store.synthrotek.com/DIRT_FILTER

DIRT is our new 4HP low-pass filter / effect for the Eurorack modular synth platform.

Inspired by one of our favorite 'noisy' filters, the DIRT is an unapologetic filter / effect that produces interesting and unique effects via the Bias knob, accessible from the front panel.

It's not a traditional filter; it's an effects module with filtering, ring mod effects, wave shaping and even outright brutal harmonic distortion.

DIRT likes to square things up a bit, so throw in a triangle, sawtooth, sine or other wave forms for different style effects. Even plugging a guitar using an external amplification module into the DIRT produces some great sounds and heavy distortion.
Controls:

- CUTOFF = Cutoff Frequency
- RESONANCE = Increase the Q!
- BIAS = Set the bias correctly or not, the choice is yours
Inputs/Outputs:
- Now shipping version 2.2, which as a buffered CV input jack. CUTOFF CV IN = Voltage range changes depending on where CUTOFF knob is positioned. External attenuation will be needed for fine modulation.
- AUDIO IN = Audio Input
- AUDIO OUT = Audio Output
Other info:
- PCB Dimensions: 4 x 1.5 inches
- 4HP
- Power consumption: less than 1mA"

Dirty But Clean - Synthrotek Dirt filter

Published on Nov 24, 2014 wellurban

"Exploring the mellower side of Synthrotek's Dirt filter: subtle waveshaping, resonant arabesques and quasi-LPG effects ... as well as the screaming resonance! Taking a clean triangle wave and turning it into all sorts of evolving waveforms."

Spinatus Tor

Published on Nov 2, 2015 voltlife

"An attempt at making vaguely Raster Noton-style clicky glitch with purely analogue modules and effects that somehow turned into something more like dark industrial.

The clicks are just a sine wave through a VCA with a very quick Maths envelope into a resonant Pittsburgh Filter in HPF mode. The filter's cutoff is modulated by a S&H, while the Maths envelope is triggered by the square sum out of a self-patched A134-4, which also acts as the master clock.

The kick drum is another Maths envelope driving a self-oscillating uVCF, the output of which is also multed into a Synthrotek Dirt filter and A124 Wasp filter to create nasty buzzy swells. Other nasty rhythmic buzzes area created by a couple of Pittsburgh Generator/GenXpander outputs into a R52 valve filter (heavily modulated by a Dreamboat) and a Sea Devils Filter, gated by Optomix or switched abruptly on and off by an A152, which is also triggering various rhythmic elements. The rest of the rhythmic patterns are created by a combination of A160/161/166.

There's also a simple pluck-ish sequence, which is a Rubicon and Mannequins Mangrove through an A108 (I think I used up all of my filters!). The sequence is created by a manually-tuned Pressure Points driven by Brains (which I think was the closest thing to a digital module I used in this patch).

Most elements then went through my spring reverb, which is a Danelectro Spring King pedal that I've hacked up to mount the springs externally. My arbitrary decision to use all analogue modules (I felt I've been relying too heavily on digital modules such as Tyme Sefari II and Erbe Verb for glitchy effects) left me with just the spring reverb for effects, so the overall mix is probably a bit too dry. Time for me to get a BBD delay, I think!"

Introducing DIRT from Synthrotek

Published on Jul 25, 2014 synthrotek

http://www.synthrotek.com/

"DIRT is our new 4HP low-pass filter / effect for the Eurorack modular synth platform.

Inspired by one of our favorite 'noisy' filters, the DIRT is an unapologetic filter / effect that produces some interesting and unique effects thanks to having front panel access to the Bias knob. DIRT likes to square things up a bit, so throw in a triangle, sawtooth, sine or other wave forms for different style effects. Even plugging a guitar (using an external amplification module) into the DIRT produces some great sounds and heavy distortion. From filtering, ring mod effects, wave shaping and outright brutal harmonic distortion, the DIRT is not a traditional filter but more of an effects module.

Controls:

- CUTOFF = Cutoff Frequency
- RESONANCE = Increase the Q!
- BIAS = Set the bias correctly or not, the choice is yours

Inputs/Outputs:

- CUTOFF CV IN = Voltage range changes depending on where CUTOFF knob is positioned. External attenuation will be needed for fine modulation.
- AUDIO IN = Audio Input
- AUDIO OUT = Audio Output
- 4HP"

TR505 through a Synthrotek Dirt Filter

Published on May 13, 2016 mute01

"Also there's a little Lexicon Alex reverb on there. The Dirt Filter is a pretty sensitive module."

http://www.synthrotek.com/

Don't be durteh

Published on Nov 26, 2014 wellurban

"A quasi-techno modular jam, skirting the edges of dirtiness with the Synthrotek Dirt filter. It starts with a plain triangle wave, and with a combination of pre-filter VCA, filter cutoff FM, and Dirt's unique combination of filtering, waveshaping, clipping and tearing resonance, converts it into a range of tones that are sometimes rich and warm, sometimes aggressive, and occasionally downright filthy."

Synthrotek DS-M and Friends

Published on Dec 16, 2014 Oren Levy

"The Synthrotek DS-M kit just arrived and I got it all assembled. The patch is explained in the beginning of the video. Modules used: DS-M, Pittsburgh Toolbox, Synthrotek Dirt, Eowave Magnetosphere filter, Makenoise Function, and Synthrotek Echo.

CV and gate is coming from a Minibrute.

This video shows the oscillator and it's amazing strangeness. Maybe I'll make another to show it's percussive sounds.
I want like 5 DS-Ms now!"

http://www.synthrotek.com/
Synthrotek on eBay

AES Modular Eurorack System

Note: Auction links are affiliate links for which the site may be compensated.
Published on Apr 8, 2020 ambitstudio

via this auction

"This is a DIY project. A complete portable eurorack format, modular synthesizer. Modules were built from PCB boards and components Custom screen printed face plates and wood control panel. Installed in a vintage case with real fabric tweed, custom screen printed image on bottom of lid. Includes a one of a kind book explaining each module as well as 8 patch examples for this specific system. Also includes power adapter, power supply and patch cables. This is a one-of-a-kind system. This can be patched into any eurorack system.

Modules:
Nonlinearcircuits 2XLFO
Nonlinearcircuits 4SEQ
Synthrotek Astronoise Oscillator
Barton Musical Circuits Random Resonator
Barton Musical Circuits Random Simple AR
GMSN! Pure VCA
Synthrotek Dirt Filter
Nonlinearcircuits Mixer
Barton Musical Circuits Buffered Multiple
Barton Musical Circuits Keyboard

Also Includes:Manual
15 Patch Cables
Power Supply and Adapter"

CLICK FOR MORE »

Synthrotek West Coast Noise System & Eventide H9 Effects

Published on Mar 5, 2016 synthrotek

http://store.synthrotek.com/West-Coas...

"the West Coast Noise System and the Eventide H9 busting out tons of noise and cinematic effects

Clear a room faster than ever with the West Coast Noise System. The amount of insanity you can create from so few modules is incredible. It's analog drums, 8bit crunch and noise married to a sequencer. Be sonically devastating or intriguingly melodic.

Includes a power brick and a 20-pack of patch cables.

Modules:
Sequence 8
MST Noise Sample and Hold / Track and Hold
Atari Punk Console
DS-M
DIRT Filter
DLY Module
1U Unity Gain Mixer
1U Stereo Output Mixer"

Synthrotek West Coast Noise System Demo Eurorack Modular Synth

Published on Feb 29, 2016 synthrotek

"http://store.synthrotek.com/West-Coas...

Clear a room faster than ever with the West Coast Noise System. The amount of insanity you can create from so few modules is incredible. It's analog drums, 8bit crunch and noise married to a sequencer. Be sonically devastating or intriguingly melodic.

Includes a power brick and a 20-pack of patch cables.

Modules:
Sequence 8
MST Noise Sample and Hold / Track and Hold
Atari Punk Console
DS-M
DIRT Filter
DLY Module
1U Unity Gain Mixer
1U Stereo Output Mixer"

VCS3 Wannabe by LavLab

Published on Mar 16, 2017 HostileSlothRecords

"Poor man's VCS3 using the Doepfer A-174 to modulate the Dave Smith DS-01 Curtis filter. 3 ring modulators from the Make Noise Wogglebug and the Qu-Bit Nebulae Vowels Synth are fed into the filter which then is run thru the SynthRotek delay. Kick drum is the Tip-Top BD808 run thru a SynthRotek Dirt.

Video and manipulations by LavLab
Filmed with GoPro & Nikon DSLR

Experimental Electronic Modular Synthesizer Noise Drone Industrial Dub Music"

Synth DIY project part 6 Chaos NAND and Delay

Published on Feb 24, 2015 Flux302 of Fluxwithit.com

"Here I talk about how this project is coming together, added are the Chaos NAND and the PT2399 Delay DEV board also the Dirt Filter has been added
All available at Http://Synthrotek.com"

Happy New Year From MATRIXSYNTH! - A Look Back at 2014

Happy New Year everyone!

I want to start by thanking everyone that comes to MATRIXSYNTH and helps make it what it is - the readers, the supporters, and of course all the sponsors on the right.

THANK YOU and have a GREAT 2015!!!

This site is a labor of love and a ton of work. This site is ultimately meant to be an testament to everything synth in the making. We have over nine years of daily synth history captured here, 119,983 published posts. I can't wait to see what the future brings us in 2015!

That said, here are a few interesting bits from 2014 in the longest post of the year. ;)

CLICK FOR MORE »

New Dwarfcraft ARF: Attack/Release/Filter

Published on Mar 11, 2015

"Dwarfcraft's second filter... this one with a foot switch to engage an envelope on the cutoff frequency, AND CV in and out!
Art by Foie Gras https://foie.bandcamp.com/"


ARF meets Eurorack! Published on Mar 11, 2015 theonetrueaen

"A THRILLING encounter between the Dwarfcraft ARF and Eurorack synthesizer. Thanks again to Pittsburgh Modular, Synthrotek, and 4MS."

And:

Vidinterview5: Scandalous Industry Dirt

Published on Mar 11, 2015

"Your Old Pal Aen spills all the secrets of the pedal building industry. Such as: Who is humping who? Who stole designs? Who drinks the bathwater? Who is a werewolf?
The FINAL segment of the vidinterview series!"