MVMNT Firmware Collection#

MVMNT (also known as SyncLFO) is a smooth random CV and LFO generator based on Hagiwo’s Bezier Curve design. It breathes life into your patches with organic, evolving modulation.

Hardware: Arduino Nano · Dual-Panel Design · Track & Hold · Inverted & Bipolar Outputs

MVMNT (Bezier Curve Smooth Random)#

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Features

  • Smooth random control voltage using Bezier curves
  • Precise control over shape and rate of modulation
  • Adjustable intensity for fine-tuning randomness
  • Track & Hold via TRIG input
  • Inverted and Bipolar outputs
  • Dynamic, unpredictable modulation

Perfect for: Organic modulation, smooth random sequences, evolving patches

Controls:

  • DEV (Deviation): Adjusts the range/intensity of randomness
  • LEVEL: Controls the output voltage level
  • CURVE: Shapes the Bezier curve character
  • FREQ: Sets the rate of modulation
  • TRIG Input: Track & Hold - freezes current voltage

LGT8F328P boards: the MVMNT firmware also runs on LGT8F328P Nano-compatible boards (32 MHz). Tick Board is an LGT8F328P below the button before flashing one - it uses a different build.

Flash MVMNT Firmware OLED preview

DRIFT — by Mike#

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Features

  • Bounded random walk — each value steps from the last, it does not teleport
  • CHAOS sets how far it may wander; it reflects at the rails instead of clipping
  • SHAPE morphs linear ramps → sample & hold → smoothstep on one bipolar knob
  • RATE from a 20-second drift up to 1 kHz, with a freeze position at hard CCW
  • TRIG becomes a clock / S&H input — or interleaves for instant polyrhythm
  • 9-bit output (512 levels) instead of the stock 8-bit

Perfect for: Sound design, organic motion curves, clocked sample & hold, slow evolving drift

Written for MVMNT by Mike, a sound designer working in film, television and games — modelled on the random modulator he uses in Kilohearts Snap Heap. He sent it to us with four words: “Share it with the community!”

Controls:

  • DEPTH (pos 1): Output amount — CCW flat, CW full swing
  • CHAOS (pos 2): How far each new value steps from the current one
  • SHAPE (pos 3): Bipolar — centre is sample & hold, CCW linear ramps, CW smoothstep
  • RATE (pos 4): 0.05 Hz → 1 kHz exponential; hard CCW freezes the output
  • TRIG Input: Emits a new value immediately — clock it, or let it interleave

The printed panel legend does not apply. DRIFT reassigns all four knobs, so the silkscreened ELEVATE / STRETCH / SMOOTH / FLUCTUATE labels are not what the knobs do. The DRIFT panel legend has the mapping.

LGT8F328P boards: DRIFT also runs on LGT8F328P Nano-compatible boards (32 MHz). Tick Board is an LGT8F328P below the button before flashing one - it uses a different build.

Read the full story and the firmware documentation

SyncLFO#

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Features

  • Classic LFO with multiple waveforms
  • Sync-able to external clock
  • Variable rate and depth control
  • Multiple output options
  • Tempo-sync'd modulation

Perfect for: Tempo-sync’d modulation, classic LFO shapes, rhythmic modulation

Controls:

  • RATE: LFO speed
  • DEPTH: Modulation amount
  • SYNC Input: External clock for tempo sync
  • Multiple Outputs: Different waveforms and polarities

LGT8F328P boards: the SyncLFO firmware also runs on LGT8F328P Nano-compatible boards (32 MHz). Tick Board is an LGT8F328P below the button before flashing one - it uses a different build.

Flash SyncLFO Firmware OLED preview

Hardware Requirements#

  • Arduino Nano or Arduino Nano (Old Bootloader); all three firmwares also run on LGT8F328P Nano-compatible boards
  • Dual-Panel Design by bkrsmdesign
    • Front: MVMNT Bezier Curve Random CV
    • Back: SYNC MOD LFO
  • CV Outputs: Normal, Inverted, and Bipolar
  • Control Inputs: TRIG for Track & Hold

Installation Instructions#

1. Connect Your Module#

  • Connect your Arduino Nano to your computer via USB
  • Ensure the module is powered

2. Select Firmware#

  • Choose the firmware that matches your needs above
  • Click the appropriate button (Nano or Old Bootloader; for an LGT8F328P board tick the option under the button first)

3. Flash Firmware#

  • Your browser will prompt you to select the serial port
  • Select the port corresponding to your Arduino
  • Wait for the upload to complete (typically 10-30 seconds)

4. Verify#

  • The module should boot up with the new firmware
  • Test the CV outputs to confirm proper operation

About MVMNT#

MVMNT is inspired by the CV section of Mutable Instruments Marbles and based on Hagiwo’s design. It features:

  • Beginner-Friendly: Straightforward assembly with few parts
  • Dual-Use Design: Flip panel offers two modules in one
  • Smooth Random CV: Dynamic, organic modulation
  • Track & Hold: Capture and hold CV values via TRIG input

The name “MVMNT” (Movement) reflects the organic, breathing quality of the Bezier curve modulation.

Troubleshooting#

Upload fails:

  • Ensure you’re using Chrome, Edge, or Opera (Web Serial API required)
  • Try unplugging and reconnecting the USB cable
  • Check that no other software (Arduino IDE, serial monitor) is using the port

Module doesn’t respond:

  • Check power connections
  • Verify correct board selection (Nano, Old Bootloader or LGT8F328P)
  • Try the opposite bootloader version

No CV output:

  • Check your power supply
  • Verify the firmware uploaded successfully
  • Test with a different output (Normal, Inverted, or Bipolar)

Resources#

Based on Hagiwo’s design · Enhanced by the Modulove community