Doepfer A-100 (1995–present)
A modular synthesizer system that helped define the modern Eurorack standard.
Overview
The Doepfer A-100 is a modular synthesizer system developed by Doepfer and introduced in 1995, remaining in production as of the latest information. It established the foundation for the Eurorack format, a now-widespread standard in modular synthesis. The system uses patch cords for signal routing and relies on 3.5 mm jacks for connections. It operates on a ±15V power supply and uses a 1V/octave control voltage standard, making it compatible with a broad range of modular gear. The A-100 is available in a "Mini Case" configuration, offering a compact entry point into the system.
Specifications
| Form factor | Eurorack system |
| Form factor height | 3U |
| Power supply voltage | ±15V |
Design
The Doepfer A-100 system uses patch cords for connections and employs 3.5 mm jacks throughout. It operates on a volts/octave control standard, typically 1V/octave, enabling precise pitch control across modules. The system is available in a "Mini Case" form factor, providing a space-efficient configuration for modular patching.
Context
The Doepfer A-100 modular system contributed to the development of a Trautonium prototype, providing the electronics for the manual controller, subharmonic oscillator (A-113), and key sound-generating modules including VCOs, VCAs, noise generators, mixers, and filters. Specific modules developed for this project include the A-113 (subharmonic oscillator), A-104 (Trautonium Formant Filter), and A-198 (Trautonium Manual / Ribbon Controller). The MAQ16/3 sequencer, designed with input from KRAFTWERK, features CV/Gate outputs compatible with the A-100 system.
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