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Mutable Instruments Marbles

Item: SYN0006473-000
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Mutable Instruments Marbles is a random module for modular synthesizers in Eurorack format. The module offers many different...  All product info

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Product information - Mutable Instruments Marbles

random module

Mutable Instruments Marbles is a random module for modular synthesizers in Eurorack format. The module offers many different ways to impress a structure on the random events created by the module: Synchronization with external clock signals, control of repetition or renewal of the generated material, quantization of voltages or randomization of gates or voltages generated by sequencers. Two parameters are available: t, a random gate generator and x, a random CV generator. As a special feature, Marbles remembers every new beat deviation of the rhythm or the tension it has generated. The Deja Vu button on the control panel controls the likelihood of reusing past material instead of collecting fresh random data.

The random gate generator t

Marbles either follows its internal clock or sets itself to an adjustable multiplication/division of an external clock (or a regular rhythmic pattern). This regular clock is disturbed by a process that simulates a musician playing with a click and trying to make up for his mistakes - from perfect accuracy to complete chaos. From this imperfect master clock, a 2-channel random rhythm is generated using one of the following processes: random coin toss, random ratcheting or random generation of drum patterns.

The random CV generator x

This generator generates three channels of random voltages, each of which is clocked by the individual outputs of the t-section or by a common external clock signal. Complete control over the distribution of the output voltages is provided as follows: concentrated or spread, quantized or unquantized, centered or prepared for a specific voltage. The same transformations can be performed on an external CV for the Sample & Hold or Shift register operation.


Mutable Instruments Marbles at a glance:

  • Random module for Eurorack systems
  • Synchronization with external clock signals
  • Adjustable multiplication / division of the external clock signals
  • Control of data repetition
  • Quantization of voltages
  • Randomization of gates or stresses
  • Two parameters: Random gate generator t and random CV generator x
  • Random generation of drum patterns possible
  • Three CV outputs per parameter unit

Mutable Instruments Marbles Demo


  • Manufacturer: Mutable Instruments
  • TE / HP: 18
  • Depth (mm): 25
  • + 12 V (mA): 80
  • - 12 V (mA): 20
  • Random: Yes
  • Trigger: Yes
Mutable Instruments Marbles Product ImageMutable Instruments Marbles
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