Guitar-like playability meets Eurorack in Four String Series

ADDAC System’s Four String Series modular synth with guitar-like playability incorporates physical strings into the Eurorack format, creating an interface that integrates string performance with modular electronics. The ADDAC120 Headstock and Bridge raises the strings to accommodate modules underneath, supports string gauges up to 0.055, includes four locking tuners and is priced at €210.

The ADDAC124 Plectrums module plucks each string independently, offers Pluck and Harmonic modes, and can send triggers through buttons or via a MIDI input, while the ADDAC121 Humbucker pairs with the ADDAC122 Quadrophonic Pickup configuration to provide a pickup for every string with independent string volume control.

Performance extensions include the ADDAC127 Ebow Slider, which provides a harness and sliding mechanism to create an Ebow-like effect, an ADDAC126 Rotary Exciter that generates a rotating magnetic field to stimulate strings at the motor’s rotational frequency, and the ADDAC125 Strings Mute, which uses a servo motor to dampen vibration in a manner likened to palm muting.

A Bow Arch Attachment can be popped onto the headstock to raise the two middle strings for bow playing, the ADDAC120F Strings Frame is designed for the Four String Series with a dedicated power supply and is priced at €360, and the Four String Series will begin shipping in July.

The Four String Series incorporates physical strings into the Eurorack format, integrating stringed performance directly into a modular system. The base ADDAC120 Headstock and Bridge raises the strings to provide clearance for modules mounted beneath the string plane. It supports string gauges up to 0.055 and includes four locking tuners for tuning stability. The ADDAC120 Headstock and Bridge is priced at €210.

The ADDAC120F Strings Frame is designed for the Four String Series with a dedicated power supply and is priced at €360. A Bow Arch Attachment can be popped onto the headstock to raise the two middle strings for bow playing. The ADDAC125 Strings Mute uses a servo motor to dampen vibration, a function likened to palm muting, while the ADDAC126 Rotary Exciter stimulates strings by generating a rotating magnetic field at the motor’s rotational frequency. The ADDAC127 Ebow Slider provides a harness and sliding mechanism to create an Ebow-like effect on any string.

The published article identifies the ADDAC124 Plectrums as a module in the Four String Series but does not provide additional technical specifics, detailed mechanical descriptions, or full operational parameters beyond its basic listed functions. The coverage does not include measurements, mounting dimensions, electrical specifications such as power consumption or voltage/current requirements, material construction, internal mechanism schematics, or latency and timing performance metrics. The available sources do not provide this information.

For purchasers or technicians seeking installation guidelines, service instructions, compatibility matrices with other modules, or comprehensive user manuals, those documents are not present in the provided article material either online.

The ADDAC121 Humbucker is presented as the dedicated pickup module for ADDAC System’s Four String Series and is specified to operate in conjunction with the ADDAC122 Quadrophonic Pickup configuration, which pairs pickups with the string set. The Quadrophonic Pickup arrangement provides a discrete pickup for each of the four strings and supplies independent volume control over each string’s output. The published article does not include additional technical specifications, electrical characteristics, connection diagrams, output formats, preamplifier details, or detailed operational parameters for the ADDAC121 and ADDAC122 modules. The available sources do not provide this information.

The Four String Series includes several dedicated effect and articulation modules that operate on the instrument’s physical strings: the Rotary Exciter, the ADDAC127 Ebow Slider, the ADDAC125 Strings Mute, and a Bow Arch Attachment. The published material describes the Rotary Exciter as a module that generates a rotating magnetic field to excite strings at the motor’s rotational frequency, the ADDAC127 Ebow Slider as providing a harness and sliding mechanism to create an Ebow-like effect on any string, the ADDAC125 Strings Mute as employing a servo motor to dampen vibration likened to palm muting, and the Bow Arch Attachment as a piece that can be popped onto the headstock to raise the two middle strings for bow playing.

The article does not provide mechanical drawings, control schematics, electrical specifications, parameter ranges, or mounting dimensions for these modules. The available sources do not provide this information.

The published article names the Rotary Exciter, ADDAC127 Ebow Slider, ADDAC125 Strings Mute and the Bow Arch Attachment as additional effect and articulation elements within the Four String Series, but it does not expand on their internal design, control schemes, signal routing, or modulation interactions. Specific technical parameters such as motor RPM ranges, magnetic field strength, actuator types, servo response curves, mechanical tolerances, materials used, finish treatments, protective coatings, physical dimensions, and environmental operating limits are not described in the available coverage. There is likewise no detailed information on user interfaces, control voltage ranges, control inputs and outputs, required power draw, connector types, mounting and installation instructions, calibration procedures, firmware or software integration details, MIDI implementation, recommended maintenance intervals, or compatibility and integration guidelines with other Eurorack modules. The available sources do not provide this information, including mechanical, electrical, and user-level documentation.

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