ADDAC 302 (2014–Present)

Plug in a Nintendo Nunchuk and your Eurorack responds to motion, tilt and thumb-stick wobble.

Overview

The ADDAC 302 Nchunk Control lets you plug a thrift-store Nintendo Nunchuk into a $3,000 modular rig. It doesn't generate sound - it takes over control. Wrist flicks, joystick leans and Z-button mashing become control voltages, and you can use them to warp filters, modulate waveforms, or scramble sequencing. It works well because the Nunchuk wasn't built for music at all.

Launched in 2014 and still in production, the 302 is part of ADDAC's 300-series of interface modules, all aimed at pulling real-world inputs into Eurorack. While other brands chased digital complexity or clean analog modeling, ADDAC went the other way and embraced the quirks of consumer tech. The Nunchuk has a wobbly joystick, a laggy accelerometer and stiff buttons, so it is hardly a studio-grade controller. The 302 turns all that into five CV outputs: X and Y from the thumb joystick, X/Y/Z from the internal accelerometer, and gate signals from the C and Z triggers. Each can be normalized, remapped, or mixed. A $10 game peripheral becomes a multidimensional modulation source.

The module is 8 HP and 40 mm deep, so it fits into any case, skiff included. The panel is black with crisp white labeling. The real action is on the back, where a tiny jumper enables +5V passthrough for the Nunchuk's I²C bus. That means the module powers the controller directly, with no external adapter. The Nunchuk's data stream is decoded onboard, not emulated, so the response feels tactile and immediate, not smoothed over like a MIDI conversion. You get the lag, the dead zones and the occasional glitch. In a modular context, those can be useful. A drifting accelerometer axis can become a slow LFO. A sticky trigger button can fire off glitchy rhythms. The joystick's nonlinear response can serve as a random sample-and-hold source.

It's not for everyone. If you want stable, repeatable control, look elsewhere. If you want physicality, surprise and a little absurdity in your patches, the 302 delivers. It's been spotted in rigs from experimental noise artists to ambient composers who use the tilt sensor to nudge reverb decay over hours-long sets. It's also a favorite in live improvisation, where a performer waving a Nunchuk like a wand adds some theater.

Specifications

Manufacturer	ADDAC System
Production Years	2014–Present
Original Price	$340
Module Type	Eurorack Controller Interface
HP	8
Depth	40 mm
Current Draw +12V	100 mA
Current Draw -12V	0 mA
Current Draw 5V	0 mA
Inputs	Nintendo Nunchuk (I²C), CV for remapping
Outputs	CV 1 (Joystick X), CV 2 (Joystick Y), CV 3 (Accel X), CV 4 (Accel Y), CV 5 (Accel Z), Gate 1 (C Button), Gate 2 (Z Button), Mix Output (CV 1 + CV 2 average)
Features	Manual and CV-accessible remapping, +5V passthrough via jumper, status LEDs
Weight	Approx. 180 g
Dimensions	8 HP x 40 mm depth
Special Functions	Continuous and step remapping of CV outputs, dedicated mix output

Key Features

The Nunchuk as Found Object

The genius of the 302 lies in its refusal to reinvent the controller. Instead of designing a sleek, calibrated joystick module, ADDAC repurposed a mass-market gaming peripheral with all its flaws intact. The Nunchuk’s joystick has a notorious dead zone in the center and uneven resistance when pushed diagonally—qualities that would be unacceptable in a traditional MIDI controller but become expressive quirks here. When you route joystick X to a filter cutoff, the lag and stickiness force you to move deliberately, almost sculpturally. It’s not about precision; it’s about gesture. And because the module outputs raw, unfiltered data, there’s no smoothing or quantization to rob it of character. What you get is a direct line from physical motion to sonic change, complete with all the wobble and jitter that implies.

Remapping as Performance Tool

The 302 also lets you reshape the Nunchuk's data on the fly. Using the front-panel buttons or external CV inputs, you can remap any parameter to a different voltage range, such as turning the accelerometer's Z-axis from a narrow 1V span into a full 10V sweep. Subtle tilts then become dramatic pitch bends, or a light joystick nudge triggers a full envelope. The remapping can be stepped (like a quantized scale) or continuous (smooth glides), which opens up melodic or atonal possibilities depending on your patch. How you hold the controller, how fast you move and how much pressure you apply all become part of the composition.

Mix Output: The Hidden Weapon

Between the main outputs is a dedicated mix output that averages CV 1 and CV 2 (joystick X and Y). It looks like a convenience, since you can blend right there instead of patching a mixer. In practice it is also a performance tool. Diagonal joystick movements create a single composite CV, so one hand can control complex parameters. You could sweep a resonant filter while modulating delay feedback in tandem, all from one diagonal thumb stroke. You can also use it as a pseudo-random source by letting the uneven mixing of two unstable signals generate evolving control voltages. It helps most in compact or live setups where patching flexibility is limited.

Historical Context

The ADDAC 302 arrived in 2014, when Eurorack was shifting from boutique curiosity to mainstream synth culture. Most new modules focused on sound generation or processing - VCOs, filters, envelopes - while control interfaces remained an afterthought. MIDI-to-CV boxes were common, but they often felt clunky, translating keyboard-based input into a format never meant for modular fluidity. The 302 stood out by embracing alternative control at a moment when modular was becoming more performative. Artists were taking systems on stage, and they needed ways to interact dynamically.

ADDAC, based in Lisbon, had already built a reputation for blending vintage-inspired circuits with conceptual flair. The 302 fit that approach: low-tech on the surface, thoughtful underneath. It wasn't the first to use game controllers in music (think Monome or Livid's earlier efforts), but it was among the first to make the integration plug-and-play within Eurorack. Competitors like Livid's Brain or Expert Sleepers' ESP-1 offered more flexibility but at higher cost and complexity. The 302 found its niche by being accessible, affordable and instantly usable. It also fit a broader trend in experimental music, the repurposing of obsolete or mundane technology as instruments, from circuit-bent Game Boys to hacked Wiimotes.

Collectibility & Value

The ADDAC 302 has been in production continuously since 2014. It has a quiet collector's appeal, not for rarity but for its unusual role in a modular setup. Original retail price was $340, and new units still sell at or near that price through authorized dealers. On the secondary market, working 302s typically fetch between $100 and $180, depending on condition and included accessories. Listings with the original Nunchuk or custom 3.5mm breakout cables can command premiums, especially in Europe where the module has a stronger following.

The most common failure point isn't the module. It's the Nunchuk. Original Nintendo controllers from the Wii era are now two decades old, and their joysticks often suffer from drift, scratchy pots, or broken ribbon cables. Third-party Nunchuks work, but they sometimes lack the I²C handshake the 302 expects, which leads to intermittent connection issues. Savvy buyers test the full range of motion and check for consistent CV output across all axes. The module's internal jumper for +5V passthrough is another concern. If it's installed improperly, it can damage the Nunchuk or cause bus conflicts. The 302 has no known catastrophic failure modes - no capacitor plague, no overheating chips - and its passive signal path means it ages gracefully.

The 302 is not a flagship module, and it isn't essential. For those who value performance and physicality, it's become a cult favorite. Restoration is straightforward: clean the Nunchuk's potentiometers, verify the I²C connection, and make sure the +5V jumper is correctly seated. No recapping or firmware updates are needed. At current prices, it's one of the more affordable ways to add multidimensional control to a system, and its compatibility with modern Nunchuk clones means it won't become obsolete anytime soon.