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Bastl Instruments KOMPAS probability trigger generator


Kompas is a three-coordinate probabilistic pattern navigator. Each coordinate has a unique traveling pace and a dedicated trigger output. The amount of probability can be adjusted manually or by external voltages. Once a coordinate has been adjusted, a new pattern is generated and looped until the next change of direction.

this tool is the outcome of the environment we are in

and is inspired by the non-linear approach to music and life – don't build any expectations, choose your direction, and discover new paths

Unlike common probability operation, instead of filtering a pre-determined sequence, Kompas uses probability to generate new looping patterns based on the direction you choose.


  • global clock and reset input
  • 3 x 32 step pattern generators with traveling algorithms
  • 3 CV inputs for coordinate modulation
  • 3 trigger outputs
  • 2/5/10ms selectable trigger length (via boot settings)
  • DIY and hacker-friendly Arduino programmable hardware
  • open-source schematics and code
  • includes a printed fanzine with navigation topics
  • available also as a DIY soldering and coding workshop

Technical details

  • 5 HP
  • PTC fuse and diode protected 10-pin power connector
  • 35mm deep (skiff friendly)
  • 5ms default trigger length
  • 5V trigger outputs
  • 0-5V protected CV inputs
  • 60Hz maximum clock rate (3600 BPM :O)
  • 6-pin FTDi connector;
  • power consumption +12V: < 30mA
  • pdf user manual DOWNLOAD


Behind Kompas there is Arduino-compatible hardware (ATMEGA328P chip) which can be re-programmed and hacked for different Eurorack applications.


  • 3 linear pots (B100k)
  • 3 CV inputs (0-5V protected circuit)
  • 3 trigger/gate outputs
  • 2 trigger/gate inputs


  • 2 LEDs hardwired to trigger/gate inputs
  • 3 LEDs hardwired to trigger/gate outputs
  • 3 LEDs accessible via backside header

bottom board extra pins:

  • 5 I/O digital pins (3 of them are connected to LEDs via jumper by default)
  • +5V and GND
  • RX connection pad (suitable for MIDI hack)
  • 6-pin FTDi connector

                                      Brand: Bastl Instruments

                                      SKU: BASTL-KOMPAS

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