Build it. Play it. Make it yours.
The PATS MP-16 is a 16-key, RGB-lit MIDI macropad you assemble yourself. It’s preflashed with open-source chord-playing firmware (on GitHub) so you can start making music right away — each key can trigger rich, customizable chords with up to 8 voices. Save your favorites to 4 onboard presets and connect to any DAW, synth, or MIDI device via USB or TRS MIDI.

What’s in the box

Partially pre-assembled PCB with Waveshare RP2040 Zero, hotswap RGB sockets, MIDI TRS In/Out, LiPo charging circuit
17 Cherry MX-compatible switches (brown)
18 keycaps (17 + 1 spare)
Rotary encoder + cap
0.96″ SSD1315 OLED display
Mounting screws

You will need

3D-printed case (STL files included)
LiPo battery (102050 3.7V 1000 mAh recommended)
Basic tools (soldering iron, screwdriver, 3D printer)

Features

Play instantly – Preloaded firmware with chord generator
Customizable – Adjust scales, intervals, octaves, and velocity on-device
Save & recall – Four onboard presets for fast switching
Universal connection – USB MIDI or Type-A TRS MIDI
DIY assembly – Solder OLED and encoder, snap in keys, print your own case

Hack it your way

Modify the firmware or write your own for the RP2040
Add knobs, sensors, or other inputs via 3 ADC-compatible pins on the PCB
Swap the OLED for other I2C-compatible displays
Reimagine the casing with the included STL files
Turn it into anything from a simple MIDI utility box to a generative sequencer

DIY MIDI kit

PATS MP-16 DIY kit