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schwung-jv880, image 1 from its README
Firmware

schwung-jv880

Hype14/100

Roland JV-880 module for Move Anything

schwung-jv880 is custom firmware for the Ableton Move, by @charlesvestal. Latest release v0.6.2 (October 2026), 14 stars on GitHub.

forAbleton Move·by@charlesvestal

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Download v0.6.2

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Custom license· charlesvestal/schwung-jv880·downloads come from the creator’s GitHub releases

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Schwung - Mini-JV Module

ROM-based PCM synthesizer emulator module for Schwung.

Based on mini-jv880 by giulioz (which is based on Nuked-SC55 by nukeykt).

Quick Start

Already have ROMs and Schwung installed?

  1. Launch Schwung → Module Store → Sound Generators → Mini-JV → Install
  2. Copy your ROM files to Move (see Requirements below)
  3. Select Mini-JV from the main menu
  4. Play pads - you're making Mini-JV sounds!
  5. Jog wheel to browse 192+ patches
  6. Encoders 1-8 for quick sound shaping (Cutoff, Resonance, Attack, etc.)
  7. Menu button for deep editing

See the full manual for complete control documentation.

Features

  • Full Mini-JV emulation with 192 internal patches
  • Multiple SR-JV80 expansion card support (sorted alphabetically for easy browsing)
  • Menu-driven parameter editing with real-time value display
  • Encoder macros for quick sound shaping:
    • Patch mode: Cutoff, Resonance, Attack, Release, LFO Rate, LFO Depth, FX Send, Level
    • Performance mode: Level, Pan, Coarse/Fine Tune, Key Range, Velocity
  • Touch-sensitive encoders show current parameter values
  • Full Patch mode editing (all 4 tones with complete parameter access)
  • Full Performance mode editing:
    • Part parameters (level, pan, tune, key range, velocity, patch selection)
    • Save performances to 16 Internal slots
    • Select expansion card for Card patches (with bank pages for >64 patch expansions)

Prerequisites

Requirements

ROM files (v1.0.0):

  • jv880_rom1.bin (32KB)
  • jv880_rom2.bin (256KB)
  • jv880_waverom1.bin (2MB)
  • jv880_waverom2.bin (2MB)
  • jv880_nvram.bin (32KB)

Note: ROM version 1.0.0 is required. Version 1.0.1 ROMs do not work correctly.

image

Expansion Cards

Multiple SR-JV80 expansion cards are supported simultaneously. Place expansion ROMs in the roms/expansions/ subfolder with filenames containing "SR-JV80".

Examples:

  • SR-JV80-01_Pop.bin
  • SR-JV80-04_Vintage_Synth.bin
  • SR-JV80-10_Bass_Drum.bin
  • SR-JV80-97_Experience.bin

ROMs are automatically unscrambled on first load. A patch cache is created to speed up subsequent loads.

Supported expansion cards:

  • 8MB cards: SR-JV80-01 through SR-JV80-19 (Pop, Orchestral, Piano, Vintage Synth, World, Dance, etc.)
  • 2MB cards: SR-JV80-97, 98, 99 Experience series

Installation

Quick Install (pre-built)

  1. Download and install the module:
curl -L https://raw.githubusercontent.com/charlesvestal/schwung-jv880/main/minijv-module.tar.gz | \
  ssh ableton@move.local 'mkdir -p /data/UserData/schwung/modules/sound_generators && tar -xz -C /data/UserData/schwung/modules/sound_generators/'
  1. Copy your ROM files to the device:
scp jv880_rom1.bin jv880_rom2.bin jv880_waverom1.bin jv880_waverom2.bin jv880_nvram.bin \
  ableton@move.local:/data/UserData/schwung/modules/sound_generators/minijv/roms/

Build from Source

Requires Docker (recommended) or ARM64 cross-compiler.

git clone https://github.com/charlesvestal/schwung-jv880
cd schwung-jv880
./scripts/build.sh
  1. Place your ROM files in dist/minijv/roms/
  2. Run:
./scripts/install.sh

User Manual

See docs/JV880_MOVE_MANUAL.md for the full control map and editor workflow.

MIDI Channel

In Patch mode the JV-880 listens on a single MIDI channel (the "basic channel"), so the channel that Schwung forwards pads/external MIDI on must match it or you'll hear silence even though notes reach the plugin. Set the Schwung receive/forward channel to 1 for the default JV-880 basic channel, or change the JV-880's basic channel via its System menu and match Schwung to that.

In Performance mode each part can listen on its own channel, so multi-channel input works as expected without any host-side configuration.

Signal Chain Integration

Mini-JV works both as a standalone module and as a sound generator in Signal Chain patches. The install script adds chain presets for using Mini-JV with arpeggiators and effects.

Current Limitations

  • Patch saving: Patch edits affect the temporary working patch but cannot be saved to Internal bank yet.
  • Some packed parameters: A few part parameters (transmit/receive switches, output select, MIDI channel routing) aren't exposed in the UI yet.

Performance

  • CPU usage: ~38% on Move's CM4 (varies with patch complexity)
  • Latency: ~46ms (buffered emulation)

License

This module includes code from:

  • mini-jv880 by giulioz
  • Nuked-SC55 by nukeykt

See LICENSE file for details.

AI Assistance Disclaimer

This module is part of Schwung and was developed with AI assistance, including Claude, Codex, and other AI assistants.

All architecture, implementation, and release decisions are reviewed by human maintainers.
AI-assisted content may still contain errors, so please validate functionality, security, and license compatibility before production use.