MATRIXSYNTH: LMNC Euro Filter and VCO demo!

Friday, November 25, 2022

LMNC Euro Filter and VCO demo!

video upload by Synth Diy Guy

"Join me as I explore the Look Mum No Computer Performance VCO and GRR Filter from Thonk that I just built!
Get yours here:"

LMNC Grr Filter - Build video

"Thonk sent me this cool kit to build!
Get yours here:

Stay Noisy!"

LMNC Performance VCO Build

"Thonk sent me this cool VCO with a built in tuner to build! Get yours here and come build it with me!

Stay Noisy!"

via Thonk

Eurorack version of the unique Look Mum No Computer funky filter with built in VCA.

For fans of strange-acting yet great sounding filters, the latest offering from Look Mum No Computer and Funque Mod #1114 Grr Filter is something to check out.
A tweaked out, modified LM13700 low pass filter, the Grr Filter can produce some gnarly clipping and with a Shelf switch, you can adjust the characteristics of the grit.
A built-in VCA makes this a great option for a compact synth voice: just add an envelope and VCO. The resonance can act delightfully strange when cranked all the way up by functioning in a stepped-sounding way adding new frequencies and notes.
A unique clipping circuit imparts a unique characteristic and is achieved not by diode clipping but just by turning everything entirely too loud. Two audio inputs lets you create interesting sonic timbres and the filter sounds different depending on if you run a unipolar or bipolar VCO in it. The #1114 Grr Filter sounds unique and can easily find a place in any rack.


Unique low pass filter
Eurorack adaptation of Look Mum No Computer’s Kosmo-format module
Voltage controlled resonance
Attenuverter on frequency input
Built-in VCA
Unique clipping circuit
Shelf switch that affects the resonance and allows asymmetric waveform clipping

Power consumption: 21mA (+12V), 11mA (-12V)
Width: 12 HP
Depth: 25 mm (inc. power connector)

via Thonk

This is an adorable DIY Eurorack version of the Look Mum No Computer analog performance VCO with built in tuner!

This is an adorable Eurorack version of the Look Mum No Computer analog performance VCO with built in tuner!

Originally designed in the Kosmo format, this handy oscillator design has been shrunk down to Eurorack and is now available as a full DIY kit.

The #1222 Performance VCO was created to be able to quickly get in tune when playing live and removes the need to have a tuner to hand when jamming with other instruments.

The VCO has a five octave rotary switch and a fine tune knob that covers exactly an octave with a centre point of C, making it easy to find the note you need.

Note that the outputs are unipolar audio signals with levels that vary from +4v to +10V.


Simultaneous square, ramp and triangle outputs.
Manual pulse width control
PWM CV input and attenuator
Five octave rotary switch
Fine tune control
V/oct input plus extra CV input and attenuator
Sync input
FM input

Power consumption: 52mA (+12V), 17mA (-12V)
Width: 12 HP
Depth: 32mm

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