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Mutable Instruments Grids

End of production
A 3-channel trigger pattern generator that is also ideal for drum patterns!

Format: Eurorack
Width: 16HP
Depth: 25mm
Current: 25mA @ + 12V, 1mA @ -12V
Manual (English)


Grids is a 3-channel trigger pattern generator. All patterns are determined by specifying the base pattern that is common to all three channels with Map X and Map Y, and specifying Fill for each channel. Map X, Map Y, and fill for each channel can be CV. You can also control the randomness or swing of the pattern with the Chaos input. The patterns for each channel are assumed to be BD, SD, and HH patterns for 3, 1, and 2, respectively, but of course they can be used as other patterns.

Depending on the option settings, 3 tracksEuclidean sequencerIt can also be used as. See the "Option" section for details. 


The explanation of each part is displayed by mouse over  


Pattern generation

Step 1: Base pattern with Map X and Map Y

The pattern is determined for each channel according to the values ​​of Map X and Map Y. For each BD, SD, HH channel, a pattern that is compatible with them is selected.


Step 2: Pattern change of each channel by Fill

Move the Fill knob for each channel to change each pattern. The figure above shows the pattern change when the CH 1 (BD) Fill knob is moved. Turning it counterclockwise will reduce the number of triggers, and turning it clockwise will result in a less dense and dense trigger pattern.


By controlling the CVs in Map and Fill, you can create more complex, longer patterns, or patterns you never imagined.


You can access the following option menu by pressing and holding the TAP button for about 1 second.


Euclidean Sequencer

By switching the Sequencer Mode in the options menu, Grids will cause each channel to generate a pattern, apart from its original function of pattern generation, using an algorithm known as a "Euclidean sequencer".

For the Euclidean sequencer, you need to specify the loop length and the number of beats, but specify the loop length of each channel with the X, Y, and chaos knobs, and the number of beats for each channel with the diagonal Fill Rate knobs. I will. Also, where to start the loop is not specified for each channel, but is specified by a common reset signal.


  • I'm doing a drum sequence with Grids. It is easy to understand because the number of patches is increasing step by step. From the middle, I also control Map and Fill with CV.

    Grids overview with TTA Drums from Equinoxoz music solutions on Vimeo.

  • Euclidean sequencer mode demo. Perfect for percussion phrases.