ALM Busy Circuits mmMidi MK2

Eurorack MIDI-to-CV Interface

• Compact 2-channel MIDI interface for converting note, velocity, and gate to control voltage
• Connects via both classic DIN MIDI and as a driverless USB MIDI device
• New USB-C connection in the MK2 version, also compatible with tablets, smartphones, and USB MIDI hosts
• Converts MIDI Clock to fixed 24x analog clock and Run outputs (DIN Sync)
• Expandable with the mmT expander for a third MIDI channel and 8 mapped gate outputs
• Minimal configuration and instant setup, in just 4HP

ALM Busy Circuits mmMIDI MK2 is a simple and compact MIDI interface for your Eurorack synthesizer. It converts two independent channels of MIDI note, velocity, and gate data into corresponding control voltage signals, either via a standard DIN MIDI connection or as a driverless USB MIDI device, requiring no additional drivers.

MIDI Clock converted to DIN Sync to synchronize your system

In addition to note conversion, the mmMIDI MK2 converts MIDI Clock into two fixed analog clock outputs and a Run output, in accordance with the DIN Sync standard. This makes it easy to synchronize modules like Pamela’s Workout to your DAW’s clock, simplifying integration between the digital and Eurorack worlds.

mmT Expansion: A Third MIDI Channel for Drums and Samples

The optional mmT expander adds a third MIDI channel with 8 gate outputs mapped to specific notes, ideal for triggering drum or sample modules directly from your controller or DAW, further expanding your system’s control capabilities.

USB-C MK2: Control Your Modular System from Any Device

The new MK2 version, updated in 2025, introduces USB-C connectivity, making it even easier to control your modular system not only from your computer but also from a tablet, smartphone, or any USB MIDI host. With minimal configuration and a hassle-free setup, mmMIDI MK2 makes it easy to control multiple synth voices and synchronize your entire rig with your digital workflow.

Technical Specifications

• Power Supply: +12V 50mA / -12V 0mA
• Format: 4HP
• Depth: 38mm
• MIDI response latency: 200–400 μs
• Resolution: 12-bit factory-calibrated 0–8V CV outputs; +5V gate
• 2 independent MIDI channels (note, velocity, gate)
• MIDI Clock conversion to analog clock x24 and Run (DIN Sync)
• DIN MIDI and USB-C connections (driverless USB MIDI device)
• Expandable with mmT expander (3rd MIDI channel, 8 mapped gate outputs)