Sentient Machine - Lowpass Filter kit

Item number: 1692

LFO modulated resonant lowpass filter.

Category: Parasit Studio kits


starting from 39,50 €

Final price incl. VAT, plus shipping (mitttel)


Shipping time: 3-7 Working days


The Sentient Machine is an LFO modulated resonant lowpass filter with two different voices: A standard wah sound and a special vowel type sound. At slow speeds it produces a spacey sweeping sound reminiscent of a phaser.

The vowel voice mode is achieved by modulating an additional filter that is tuned higher and sweeps in the opposite direction. It's a combination of filters sometimes referred to as a formant filter. This circuit uses PWM and CMOS switches as variable resistors insted of vactrols or jfet's, which gives a perfectly matched set of variable resistors and more accurate modulation at low resistances.

This kit is a creation by in cooperation with If you have any problem with the content of the kits like mising or wrong parts, please contact Musikding (Klaus) at For any technical problem relating to building this project, please contact Fredrik at

Here´s the parts list: Parts List (BOM)

This kit contains all parts you need to build a fully functional effect pedal. Not included in the kit, but also good to have:

  • Aluminium enclosure: select one from top
  • 9V DC power supply
  • 2 nice knobs for the potentiometer, up to 25mm diameter and for 6.3mm shafts
  • Decal, transfer or transparent sheets for labeling

Sentient Machine docs.

Instrument: Guitar Bass
Effect-Type: EQ/Mix Mod/Echo Octave

Ratings (2)

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Total entries: 2
5 from 5 Well made & great sound.

A great sounding pedal and fairly easy build for an inexperienced builder as me.

., 28.09.2017
5 from 5 waouaouaayyaaaa

I build the Sentient Machine yesterday. Easy to build, cool looking (blue leds) and above all very nice sounding.

Thanks Musikding and Parasit Studio

., 04.07.2018
Total entries: 2

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