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.
