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Image: reddit.com · Video still: Midi Fire Cat — a MIDI controller with an accelerometer (mpu6050), a force-sensing resistor, and four pots (the red things are the caps). Based on ATmega32U4. T

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Midi Fire Cat: a tilt-sensing MIDI controller

An ATmega32U4 controller with an accelerometer, pressure sensor and pots, whose Max for Live device turning motion into MIDI was coded with Claude's help.

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Credits

  • Reddit poster gilou_ Source ↗

Earliest dated source: 3 Mar 2026

The full story

Midi Fire Cat is a home-made MIDI controller based on an ATmega32U4, with an MPU6050 accelerometer, a force-sensing resistor and four pots, in a 3D-printed body on a wooden base. Tilting it left and right moves the play head of a granular synth.

The maker had never used Max for Live before and used a free week of Claude to help code "midipulator", a device that turns the sensor data into MIDI in accordion, cello bow and omnichord strum modes. Some original ideas turned out not to be possible, and the omnichord mode has some latency, but the maker says the cello bow and omnichord modes are fun to play.

How it was done

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Sources

From a short post by the maker, so the details are as they tell them.

  • Reddit: Midi Fire Cat — a MIDI controller with an accelerometer (mpu6050), a force-sensing resistor, and fouForum threadreddit.com
    Reddit poster: gilou_Posted 3 Mar 2026

    The maker's post on r/synthdiy.

    If it disappears: archived copy of Reddit: Midi Fire Cat — a MIDI controller with an accelerometer (mpu6050), a force-sensing resistor, and fou (opens in a new tab)

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