doepfer-a-166

Doepfer A-166 Dual Logic

Dual three-input Boolean logic for rhythmic gate wizardry

8 HP Eurorack module

The A-166 Dual Logic is a dual three-input logic processor for Eurorack modular synthesizers, combining digital gate and trigger signals using AND, OR, and XOR functions simultaneously. It is a utility powerhouse for rhythmic manipulation, enabling gated clocks, complex rhythmic patterns, and Boolean combinations of any digital signals in the A-100 system. Two independent inverters provide NAND, NOR, and NEXOR functions, making it an essential tool for generative and rhythmic patching.

Features

  • Two identical three-input logic units operating simultaneously
  • AND, OR, and XOR outputs available simultaneously per unit
  • Two independent inverters for NAND, NOR, and NEXOR functions
  • LED display for each output showing current logical state
  • Normalized input sockets: socket 2 normalled to input 1, socket 3 normalled to input 2
  • Accepts any analog voltage: below +1V = logical 0, above +2V = logical 1
  • Logical 0 output is approximately 0V (less than +1V), logical 1 output is +12V (at least +10V)
  • Designed to combine gate, clock, and trigger signals in the A-100 system
  • Typical applications: gated clocks, rhythmic clock patterns, Boolean signal combination

Controls & Jacks (24)

  • Unit 1 OR Output— OR logic output of unit 1
  • Unit 1 Input 2— Second input for AND, OR, XOR logic functions of unit 1
  • Inverter 1— Indicator for inverter 1 output state
  • Unit 1 Input 3— Third input for AND, OR, XOR logic functions of unit 1
  • Unit 2 Input 1— First input for AND, OR, XOR logic functions of unit 2
  • Unit 1 AND Output— AND logic output of unit 1
  • Unit 2 Input 2— Second input for AND, OR, XOR logic functions of unit 2
  • Unit 1 XOR Output— XOR logic output of unit 1
  • Unit 2 Input 3— Third input for AND, OR, XOR logic functions of unit 2
  • Unit 2 XOR Output— XOR logic output of unit 2
  • Unit 1 AND— Indicator for AND output state of unit 1
  • Unit 1 Input 1— First input for AND, OR, XOR logic functions of unit 1
  • Unit 2 AND Output— AND logic output of unit 2
  • Unit 1 OR— Indicator for OR output state of unit 1
  • Inverter 1 Output— Inverted output of inverter unit 1
  • Unit 2 AND— Indicator for AND output state of unit 2
  • Unit 2 OR Output— OR logic output of unit 2
  • Inverter 2 Input— Input for inverter unit 2
  • Unit 1 XOR— Indicator for XOR output state of unit 1
  • Inverter 2— Indicator for inverter 2 output state
  • Unit 2 OR— Indicator for OR output state of unit 2
  • Unit 2 XOR— Indicator for XOR output state of unit 2
  • Inverter 1 Input— Input for inverter unit 1
  • Inverter 2 Output— Inverted output of inverter unit 2

How-To Guides

  • Gated Clock
  • XOR Rhythmic Collision
  • Three-Clock Boolean Rhythm
  • Inverted Gate Fill
  • Two-Signal Logic Merge
  • Envelope Gate Sculpting
  • NAND and NOR Dual Inverted Logic
  • Clock Edge Doubler via XOR
  • Boolean Sequence Switching

Explore the interactive A-166 Dual Logic panel on BleepDex — tap any control to learn what it does.

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