HexInverter Mutant Snare Kit

This is for a Kit (including programmed microprocessor) set in the Eurorack format.

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From classic electro snares to warping, alien percussion, the Mutant Snare is a radical departure from the static sounds of the 808!


  • MIX lets you blend between the SHELL and SNAPPY tones that make up the overall snare drum
  • turn up the DRIVE to get overdriven snare tones with intense harmonics. The purple LED indicates when the snare begins to overdrive
  • like the other Mutant Drums, signal levels have been normalized for modular level input and output (up to 20Vpp)

SHELL synthesizes the drum skins

  • analog bridged-t sinewave oscillators, for those organic-sounding tones we've come to love from the 808
  • TONE control blends between the two sinewaves of different frequency
  • SHELL PITCH lets you tune one of the sine waves, to change the pitch of your snare drum

SNAPPY adds some noise to the snare

  • an analog white noise generator feeds the SNAPPY circuit
  • an external input lets you patch any sound source you like into the SNAPPY generator
  • voltage control of SNAPPY decay
  • SNAPPY feeds into an analog selectable high-pass or band-pass filter
  • voltage control of filter cutoff frequency
  • when nothing is plugged into the cutoff CV input, the SNAPPY envelope OR the adjustable sinewave from the SHELL generator normalize through the CV attenuverter for cutoff CV. A jumper on the back of the module allows you to select which of these internal modulation signals are routed here.
  • filter has three resonance settings: classic 808 (low resonance), high resonance, and self oscillation
  • bipolar attenuators (aka: 'attenuverters') on CV inputs

Specs & Downloads

Specs & Downloads

100 HexInverter
HP 13
Depth 30mm
+12V 50mA
-12V 50mA
+5V No
Additional Resources Build Guide Bill of Materials Mouser Cart


Customer Reviews (2)

cool module -- questionable kit?Review by Alex Are
Love the module. Great snare. But a word of warning to other DIYers out there that my kit arrived with a pretty high number of damaged parts.

1. Most of the IC's had very badly bent pins.
2. About half the input jacks had to be tossed out.
3. A quarter of the pots had badly bent pins as well.

I had just received a bucketfull of pots and jacks for other modules so it was no love lost, really, but you might want to be aware and have some spares on hand.

Might have just got unlucky in shipping, though -- can't say.

Otherwise the build was very straightforward with great documentation. I was surprised that they did all the SMD work for you in advance! Cheers to hexinverter, and happy wiggling to all. (Posted on 9/1/2017)
nice and snappy!Review by jstory
just finished this build last night. great sounding snare / noise module. The external input for the snappy section is a nice addition.

the build guide was really well done. nice HQ pics to follow the build.

it was a pretty tedious assembly with a lot of small solder points, but well worth it in the end! (Posted on 1/9/2017)

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