Mutated: Clouds

Mutated: Clouds- A granular texture synthesizer that needs no introduction. Even this one.

This is a PCB set in the Eurorack format.

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Clouds is a granular audio processor - with a couple of twists.

Unlike granular sample players, Clouds is focused on the realtime granularization of incoming audio signals, and the acquisition of textures from them.

Classic controls such as grain position, size, and pitch are provided. Clouds can superimpose up to 16 grains simultaneously and thus create thick textures. Control over texture density, independently of grain size, is thus provided. An external trigger input allows grains to be seeded in sync with LFOs or rhythmic generators.

To provide a richer variety of timbres, Clouds allows the shape of the grain's envelope to be morphed - from sharp rectangular edges to a smooth bell curve. In addition, a diffusion network can further dissolves the edges of grains into blurry textures.

"Grain mesh" modes automatically adjust grain density, size, and the offset between successive grains in order to generate a continuous stream of audio that can be pitch-shifted / time-stretched in the manner of old-school samplers (or time-domain pitch/time processors).

Finally, to cover various applications of granular synthesis without the need for additional modules, Clouds' comes with four voltage-controlled "blend modes" for mixing and re-routing its output signal: VC dry/wet balance, VC channel crossfade, VC feedback, and VC reverberation.

Clouds' delay memory ranges from 1s to 8s depending on audio quality settings.


NOTE:  All Mutated modules are designed by Olivier Gillet, and are CC-BY-SA.  

Ground rules:

  • Do NOT ask on the mutable forums or email Mutable Instruments for help.  There is literally ZERO support offered from those channels - don't be an ass.  A number of Facebook groups exist to help with DIY builds, and we're happy to help as well.
  • Do NOT (re)sell these, passing them off as factory modules.  Seriously - don't be an ass.
  • Do NOT be totally scared of SMT.  If you haven't done it before, it's off-putting, we get it - but give yourself a chance.  Learn something.  That's what (we think) DIY is all about.  We're keeping the prices on these low enough that you can afford to try and fail!
  • DO have a ton of fun building them, and use them to create awesome sounds.  Then go buy a Mutable Instruments module and SUPPORT Olivier's designs, directly.

Specs & Downloads

Specs & Downloads

Manufacturer Modular Addict
Depth No
+12V No
-12V No
+5V No
Additional Resources Mouser BOM PCB Parts Placement


Customer Reviews (2)

Hard.Review by DennisL
I have not build clouds from another PCB manufacture.

Its really hard to solder this one. Ground pads are a massive heatsink so that its hard to solder almost all the ground pads.

Ok. I build 3 and all good. (Posted on 2/12/2018)
Great PCBReview by Philip
A great quality Clouds rev 3 PCB. Be aware that the Mouser BOM linked doesn't include some components (jacks, pots, etc). The Euro SMD DIY Noobs group on Facebook is a great resource for building any of the Mutable modules and it has links to full BOMs.

This was my first SMD build. This is not a beginner build! It took me 10 hours of rework and troubleshooting with an O-scope to fix all my nooby mistakes. Find something smaller if you are just getting started with SMD soldering. (Posted on 2/24/2017)

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