We Know Your Frustrations
Every accordionist who's tried MIDI has hit these walls. MidiCore was built to break them.
"MIDI converters just do Note On/Off"
→ MidiCore gives you ultra expressive bellows control — 16 million levels of nuance. Your bellows control the sound exactly like on your acoustic.
"The Roland FR-8x is expensive and closed"
→ MidiCore is customizable firmware, works with any MIDI synthesizer. Your accordion, your rules.
"No real musette sound in MIDI"
→ 6 authentic musette styles with Low-Medium-High voice combinations. From dry concert to full bal-musette.
"Stradella bass is poorly emulated"
→ Complete Stradella system: 48 to 120 bass, all 6 chord types, circle of fifths layout, adjustable voicing density.
"I have to bring a laptop on stage"
→ No PC needed. MidiCore boots in 2 seconds, fits inside your accordion, and never crashes.
"Bellows shake tremolo isn't detected"
→ Automatic bellows shake detection. Play tremolo naturally — MidiCore reproduces it on any synth.
"My looper only records audio"
→ MIDI Looper: 4 tracks × 8 scenes. Transpose loops, edit notes, change sounds — after recording. Impossible with audio.
"I need an external synth and amp on stage"
→ Internal mics + Dream sampler + headphone/line out. Play with built-in sounds, use USB send/return for DAW effects. One cable, all your sound.
"I can't afford a free-bass accordion"
→ Software free-bass conversion. Your Stradella plays chromatic — no mechanical change. Save
"I play alone — I sound alone"
→ Record bass, add chords, layer melody, switch to solo. Be your own orchestra, controlled entirely by your feet.
ultra expressive Bellows Expression · 16 million levels of nuance
Your Bellows Finally Speak
With a professional pressure sensor, MidiCore captures every push, every pull, every swell — and translates it into expressive MIDI in real time.
- Push ≠ Pull: independent curves, like your acoustic
- 4 response curves: choose what feels natural to you
- Auto-calibrates to your playing style at startup
- Controls both volume AND timbre simultaneously
- Response so fast you forget it's MIDI
6 Authentic Musette Styles · From dry concert to full bal-musette
Real Musette — Not Approximation
No VST plugin does this right. MidiCore reproduces the exact detuning patterns of real reed ranks, with independent volume per voice and stereo spread.
- Dry — Concert, bassoon, clarinet tone
- Light — Chamber music, subtle warmth
- American — Swing, jazz, light vibrato
- Italian — Folklore, tarantella, dancing
- French — Bal-musette, waltz, java
- Extreme — Cajun, folk, diatonic character
- Plus Custom — create your own signature sound
Complete Stradella Bass · 48 to 120 bass — all chord types
Your Left Hand, Fully Respected
Other converters give you basic notes. MidiCore gives you the real Stradella experience: counter-bass, fundamental, major, minor, dominant 7th, diminished 7th — with voicing density you can adjust.
- Supports 120, 96, 72, 48 bass + free bass layouts
- Circle of fifths layout — play like you always have
- Independent bass and chord velocity
- Adjustable voicing: sparse, normal, or dense chords
- Octave doubling on bass notes: On/Off
16 Registers · Smooth crossfade transitions
Switch Sounds Instantly — No Clicks
Master, Musette, Bandoneon, Accordion, Violin, Clarinet, Bassoon, Piccolo, Organ, Harmonium, Oboe, Flute — plus 4 custom registers you define yourself.
- Smooth transitions: no click, no gap between sounds
- Change registers by footswitch (next/previous)
- Different registers per keyboard zone
- Crossfade speed adjustable to your taste
Audio I/O & USB Send/Return · Internal mics · XLR/TRS outputs · Wireless MIDI · Dream sampler · DAW effects
Sound Without External Gear
Your accordion becomes a complete audio system: capture your reed sound with internal electret capsules, play synthesized sounds via the onboard Dream sampler, send right hand and left hand to separate XLR/TRS balanced outputs for the sound engineer, go wireless with Bluetooth 5 BLE-MIDI, and process everything through your favorite DAW plugins via USB effects send/return — all mixed and routed exactly how you want.
- 2 internal electret microphones (treble + bass sides)
- Dream SAM5716 sampler — accordion, organ, strings, brass
- XLR/Jack TRS outputs — separate right hand (treble) + left hand (bass) balanced outputs for professional PA and studio
- Headphone + line output — practice silently or go to PA
- USB Audio Class — your accordion is a USB audio interface
- USB Effects Send/Return — send audio to your DAW, apply any VST plugin (reverb, delay, chorus, EQ), receive the processed audio back
- Wireless MIDI (HF) — Bluetooth 5 BLE-MIDI, play cable-free up to 10 m, compatible iOS/Mac/Windows/Android
- Mix acoustic + synth + DAW effects in one output
- Latency < 6 ms including USB round-trip
Free-Bass Conversion · Stradella → Chromatic — no mechanical change
Your Stradella Plays Chromatic
Classical, jazz, and contemporary accordionists can play chromatic bass lines on their existing Stradella accordion. Switch between Stradella and free-bass modes with a footswitch. No drilling, no new buttons — just MidiCore.
- Software conversion — no mechanical changes to your instrument
- Switch Stradella ↔ free bass by footswitch or register
- Up to 58 chromatic notes from your existing buttons
- Belgian layout and custom layouts supported
- Octave shift ±2 octaves by footswitch
- No need to buy a dedicated free-bass accordion
Your Solo Bal-Musette Set — In 4 Steps
Be a full band on your own. Everything controlled by your feet — your hands stay on the accordion.
Record the Bass
Stradella bass, 4 bars, loops automatically
Add the Chords
Left hand chords, overdub on track 2
Play the Melody
Musette melody on track 3, full expression
Switch Scenes
Footswitch: verse → chorus → bridge → solo
4 tracks × 8 scenes — transpose, edit, undo/redo — all MIDI, all live, all at your feet.
Ready-to-Play Presets
Plug in, select your style, and play. Each preset is crafted for a specific musical tradition.
Bal-Musette
French musette 3 voices L-M-H, swing 58%, S-curve expression, 120 Stradella
Italian Folk
Italian musette 3 voices, expo expression, 120 Stradella, tarantella ready
American Swing
American musette 2 voices M-H, jazz swing groove, 120 Stradella
Classical Concert
Dry musette 1 voice M, linear expression, free bass chromatic
Tango
Bandoneon register L-M, log expression, high legato priority
60+ Effects — What They Do for Your Accordion
Not just generic MIDI effects. Each one solves a real problem for accordion performance.
MIDI Looper
Record bass, add chords, layer melody, switch scenes by foot. Be your own orchestra.
Transposition
Change key instantly by footswitch. Same fingering, different tonality. Perfect for singers.
Harmonizer
Add automatic harmonies to your melody. Play one note, hear a choir.
Force-to-Scale
Stay in the scale no matter what. Improvise fearlessly — even wrong notes sound right.
MIDI Router
Right hand → synth 1, left hand → synth 2. Layer any combination you want.
Arpeggiator
Automatic patterns on your bass notes. Walking bass from a single button.
Swing
Automatic jazz/funk/shuffle groove. Your playing gets that natural "bounce."
Automation
Record your expression movements. Replay them perfectly, every time.
Honest Comparison
We don't hide from the competition. Here's how MidiCore stacks up.
| Solution | Bellows | Musette | Stradella | Audio I/O | XLR Out | Wireless | Free Bass | MIDI Looper | 60+ Effects |
|---|---|---|---|---|---|---|---|---|---|
| Basic MIDI Converter | 8-bit | Partial | Partial | Partial | Partial | Partial | Partial | Partial | Partial |
| Roland FR-8x | ✓ Built-in | ✓ Built-in | ✓ Built-in | ✓ Built-in | Partial | Partial | Partial | Partial | Limited |
| Bugari Evo | ✓ Built-in | ✓ Built-in | ✓ Built-in | ✓ Built-in | Partial | Partial | Partial | Partial | Partial |
| MidiCore Accordion | ✓ ultra expressive | ✓ 6 styles | ✓ 120 bass | ✓ USB + mics | ✓ R+L separate | ✓ BLE-MIDI | ✓ Software | ✓ 4 tracks | ✓ 60+ |
And with MidiCore, your accordion can drive ANY MIDI synthesizer — you're not limited to built-in sounds.
Works With Your Accordion
Piano, chromatic, diatonic, bayan, concertina, bandoneon — MidiCore adapts to your instrument.
Piano Accordion
Full support: 120 bass, musette, bellows, registers. The reference configuration.
Chromatic Button
Custom button mapping. Your layout, your configuration.
Diatonic
Push/pull mapping configuration. Both directions, different notes.
Bayan
Free bass layout. Concert classical, fully supported.
Concertina
Bidirectional bellows expression. Full expression in both directions.
Bandoneon
Bisonoric + expression. Tango instrument, fully MIDI.
Stradella → Free Bass Conversion
Any Stradella accordion becomes a free-bass chromatic instrument — purely in software, no mechanical change, no drilling, no new buttons. Switch between Stradella and free-bass modes by footswitch. No need to buy a dedicated free-bass instrument.
My Commitment as an Accordion Luthier
I Know Your Instrument
I build accordions. I know what an accordionist expects — because I am one.
Handcrafted
Every module is assembled and tested by me personally in my workshop in Saint-Nazaire.
Open Source
The firmware is customizable — no black box. You own your instrument, fully.
Direct Support
You talk to the luthier who designed the product. No call center.
Continuous Evolution
MidiCore improves with your feedback as an accordionist. Your input shapes the product.
Disability & Accordion — They Play Thanks to MidiCore
3 stories of accordionists who rediscovered their art despite disability.
Marie — Accordionist & Parkinson's
"My hands tremble, but my music doesn't anymore."
Marie played bal-musette gigs for 30 years. Parkinson's tremors forced her to stop. With MidiCore, every wrong note is filtered automatically. Her waltz and tango repertoire stays intact — her audience can't tell the difference.
✓ Back to village dances and festivals
✓ Zero wrong notes despite tremors
✓ Bellows expression preserved 100%
✓ Plug in and play — no complex setup
Her musical life continues
Thomas — Accordionist & Hemiplegia
"With one hand, I make a whole orchestra sound."
After a stroke, Thomas lost his left hand. No more Stradella bass, no more chords. With MidiCore, one finger = one full chord. The looper records his right hand while he builds accompaniment layer by layer. He's a professional musician again.
✓ Full chords with a single finger
✓ 4-track looper — a one-person orchestra
✓ Successful professional comeback
✓ Concert income restored
His career restored
Sophie — Music Therapist & Adapted Accordion
"My patients blow into the accordion and rehabilitation moves forward."
Sophie uses the MIDI accordion with MidiCore for sessions with children with disabilities. The child blows, and the accordion plays — impossible to play wrong thanks to Force-to-Scale. Progress is measurable. Sessions last longer because the child is having fun.
✓ Fun respiratory rehabilitation
✓ Impossible to play wrong — instant confidence
✓ Measurable progress session after session
✓ Professional clinical tool recognized
Certifiable therapeutic tool
Let’s talk about your instrument
Every MidiCore installation is designed case by case, around the instrument, the playing style and the musician’s needs. Write to us and we will come back with a tailored proposal.