overdub
FirmwareM-VAVE FM-1

FM-106

PatttF/fm-106 · ★ 14

Port of the KR-106 Juno-106 emulation to the FM-1: six voices, 128 factory presets, a BBD-style stereo chorus and dual-core DSP adapted from Melodee.

README from GitHub, GPL-3.0

FM-106

Authentic 6-Voice Polyphonic Roland Juno-106 Style Synthesizer Firmware for the M-VAVE FM-1

FM-106 is inspired by the analog emulation engine of the legendary 1984 Roland Juno-106 synthesizer to the ultra-portable M-VAVE FM-1 hardware workstation. Engineered with single-precision floating point effects, an authentic 1980s Roland interface with real-time CRT oscilloscope, 256 presets with on-device naming, a 128-step acid sequencer with piano roll, wireless Bluetooth MIDI (Host and Peripheral), and a 45-parameter MIDI CC engine featuring live MIDI Learn.

📖 Comprehensive User Manual: For complete operational instructions, diagrams, step-by-step tutorials, and parameter charts, open manual.html in any web browser.

Key Features

FeatureDescription
6-Voice PolyphonyTrue 6-voice polyphonic Juno-106 synthesis with dynamic voice allocation and unison modes.
PolyBLEP DCOBandlimited PolyBLEP Sawtooth, Pulse width modulation (LFO / Manual), Sub-oscillator (-1 oct), and White Noise.
IR3109 VCF4-pole 24 dB/oct resonant low-pass filter with self-oscillation and non-linear OTA saturation curves. Sub-sampled at 11 kHz for peak CPU efficiency.
4-Position HPFAuthentic discrete resistor network: 0: BST (+9.4 dB shelf @ 103 Hz), 1: FLT (Flat), 2: 236 (236 Hz), 3: 754 (754 Hz).
14-Bit ADSRAuthentic NEC μPD7811G voice processor envelope with log decay/release and linear attack.
MN3009 BBD ChorusDual bucket-brigade delay line emulation: OFF, Chorus I (0.51 Hz antiphase), Chorus II (0.86 Hz antiphase), and Chorus I+II (9.75 Hz in-phase rotary vibrato).
Tape & ShimmerFPU-accelerated vintage tape echo (saturation, wow/flutter) and octave pitch-shifted shimmer reverb.
128-Step SequencerAcid sequencer with visual piano roll, parameter locks (P-Locks), ratchet (1..4), tie, accent, slide, probability, swing, and live recording.
256 Presets128 Factory presets (Bank A & B 11..88) + 128 User writable presets (Bank UA & UB 11..88) with on-screen alphanumeric name editing and flash persistence.
MIDI Learn Engine45 mappable sound, effects, and sequencer parameters with dynamic on-device MIDI Learn and flash memory storage.
Bluetooth LE MIDIWireless MIDI in both Device Mode (connects to Mac, iOS, Windows, Android) and Host Mode (pairs directly with wireless MIDI controllers).
Class-Compliant USB16-bit 44.1 kHz stereo digital audio streaming directly into your DAW and bidirectional USB-MIDI with SysEx librarian support.
CRT OscilloscopeReal-time waveform display with zero-crossing trigger stabilization and Roland oscilloscope graticule.

Hardware Controls & Navigation

                       [ M-VAVE FM-1 PANEL ]
 ┌─────────────────────────────────────────────────────────────┐
 │  [ 240x240 LCD DISPLAY ]     [SELECT]   [ALGO]    (MASTER)  │
 │  • Header & Voice LEDs        Encoder    Encoder    Volume   │
 │  • 4 Live Parameter Faders                                  │
 │  • Real-time Oscilloscope    [PRESETS]  [1] [2] [3] [4]     │
 │                               Encoder     Macro Knobs       │
 │                                                             │
 │  [OCT-] [OCT+] [FX]   [SEL]  [ENV]  [LFO]  [EDIT]  [GLO]    │
 │  [HOME] [SAVE] [ARP]  [SEQ]  [PLAY] [REC]                   │
 │                                                             │
 │  [ ||| | ||| | ||| | ||| | ||| | ||| | ||| ] 27-Key Touch   │
 └─────────────────────────────────────────────────────────────┘

Quick Button Shortcuts

  • ENC_SELECT (Turn): Browse through parameter edit pages.
  • ENC_ALGORITHM (Turn): Cycle preset banks: Fact A → Fact B → User A → User B.
  • ENC_PRESETS (Turn): Browse 64 patches within the active bank (11 to 88).
  • ENC_KNOB1..4: Direct hands-on control of the 4 sliders on the active edit page.
  • BTN_EDIT: Step to next parameter page (Hold 500ms in Sequencer for global options).
  • BTN_HOME: Instant return to primary VCF page; cancels menus.
  • BTN_GLO: Open Global Options Menu (MIDI Setup, Bluetooth, System Specs).
  • BTN_SAVE: Open Preset Save & Name Editor to store custom patches into user banks.
  • BTN_FX: Cycle through effects processors: Chorus → Tape → Reverb.
  • BTN_ENV / BTN_LFO / BTN_ARP: One-touch page jumps.
  • BTN_PLAY / BTN_REC: Transport start/stop and real-time live recording with 4-beat count-in.

Parameter Edit Pages

Turn the SELECT encoder or tap EDIT to move through the 10 sound design pages:

PageFader 1 (Knob 1)Fader 2 (Knob 2)Fader 3 (Knob 3)Fader 4 (Knob 4)
1. VCFFREQ: Cutoff (0..127)RES: Resonance (0..127)ENV: Env Depth (0..127)LFO: LFO Depth (0..127)
2. VCF 2KBD: Key Track (0..127)INV: Polarity (NORM/INV)B.DCO: Bend→DCO (0..127)B.VCF: Bend→VCF (0..127)
3. DCORNG: Octave (16', 8', 4')PULSE: Pulse (OFF/ON)SAW: Sawtooth (OFF/ON)SUBSW: Sub-Osc (OFF/ON)
4. DCO 2SUB: Sub Level (0..127)NOISE: Noise (0..127)PWM: Width/Depth (0..127)DCOLFO: Pitch LFO (0..127)
5. ENVELOPEATK: Attack (0..127)DEC: Decay (0..127)SUS: Sustain (0..127)REL: Release (0..127)
6. LFORATE: Frequency (0..127)DELAY: Onset (0..127)PWM MD: LFO / MANASSIGN: Voice Mode (MONO, POLY I, POLY II)
7. ARPARP: Arp (OFF/ON)MODE: UP, U&D, DNARAT: Rate (0..127)ARNG: Octaves (1..3)
8. FXCHO: Chorus (OFF..I+II)HPF: BST / FLT / 236 / 754VCA: Mode (ENV / GATE)LEVEL: Volume (0..127)
9. TAPETYPE: WARM / VINT / LOFIMIX: Wet/Dry (0..127)RATE: Speed/Flutter (0..127)CHAR: Drive & Tone (0..127)
10. REVERBREV: Shimmer (OFF/ON)MIX: Wet/Dry (0..127)DECAY: Tail Length (0..127)SHIM: Pitch Shimmer (0..127)

Step Sequencer & Piano Roll

The onboard sequencer stores up to 128 steps per patch with an interactive piano roll view:

  • Step Entry: Scroll through steps with SELECT; play notes on the keyboard or dial pitches with Knob 2 (NOTE).
  • Live Recording: Tap BTN_REC, then press BTN_PLAY. A 4-beat visual metronome count-in runs before capturing live performance and gate duration.
  • Step Options (Tap EDIT):
    • RATCHET (1..4): Trigger micro-burst ratchets per step.
    • TIE: Connect notes into smooth legato phrases without envelope re-triggers.
    • ACCENT / SLIDE: Classic acid bassline punch and portamento glide.
    • PROB (0%..100%, MUTE): Generative rhythm probability.
    • P-LOCKS: Per-step knob parameter automation.
  • Global Options (Hold EDIT 500ms): Set length (1..128 steps), tempo (40..240 BPM), clock division, swing percentage, or duplicate active bars (DUP BARS).

MIDI CC Configuration & Learn

FM-106 includes an on-device MIDI continuous controller engine controlling 45 parameters.

How to Use Live MIDI Learn:

  1. Press BTN_GLO → MIDI SETUP → CC CONFIG.
  2. Scroll to the parameter you want to assign (e.g. [VCF] CUTOFF).
  3. Press BTN_SEL. The screen flashes MIDI LEARN: SEND CC.
  4. Wiggle any knob, slider, or pedal on your external MIDI controller.
  5. The CC is instantly mapped, saved to flash, and ready to use!
  6. Tap BTN_EDIT to reset the selected parameter to its factory default CC.

(For the complete 45-parameter default CC chart, refer to manual.html).

Web Simulator & Patch Librarian

  • simulator.html: Interactive WebAssembly simulator running the exact FM-106 audio DSP engine and UI directly in your web browser.
  • Librarian.html: Visual patch librarian supporting Web MIDI. Connect the FM-106 over USB to audition, back up, and load standard Roland Juno-106 SysEx files (.syx), Jarvik7 (.106), Web JSON, vintage Roland Juno-106 Tape Cassette audio files (.wav), and .pjunoxl preset files. Includes the 64-preset LFO Store Future Classic soundset and the Lixor soundset.

Building & Installation

Prerequisites

  • macOS or Linux with Docker (for cross-compiling via JieLi toolchain / AC79 SDK).
  • Python 3 with pyserial and mido for USB installation.

1. Build Firmware

# Single-core build (ultra-stable, FPU accelerated):
./build.sh

# Dual-core build (CPU0 + CPU1 parallel audio):
DINGHY_DUAL_CORE=1 ./build.sh

2. Build WebAssembly Simulator

./emu/build.sh
node emu/emu_test.mjs

3. Install to M-VAVE FM-1

Connect your FM-1 via USB-C and flash the package:

python3 tools/fm1_install.py build/fm106.fwsc --yes

Hardware Recovery: If needed, hold BTN_OCT_DOWN while powering on to enter the hardware bootloader rescue mode.

License

GPL-3.0-only. Built upon the Felucca / SLOOP / Dinghy platform by Leo Kuroshita (@kurogedelic), Hügelton Instruments, and isod89. DSP models adapted from Ultramaster KR-106 by Kayrock Screenprinting and Melodee by Kerem Kilic.