Choose your input
Open KeyFlow, select your physical MIDI keyboard, and let the app publish a clean virtual output.
iOLABS · Edition 2026.01
KeyFlow
Scale-safe MIDI for live keys.
A macOS app and AUv3 MIDI FX router that keeps your performance inside the right scale while preserving real chords, useful color notes, and stage-ready control.
AUv3 MIDI FX
CoreMIDI Router
aumi KFlw ADrv
Live MIDI flow
From keyboard chaos to musical control.
KeyFlow sits between your keyboard and the instrument, reading MIDI before it reaches the sound.
KeyFlow
Keyboard → KeyFlow Out → DAW
Signal path
Keyboard → KeyFlow → DAW
KeyFlow does not make sound. It shapes MIDI before the instrument sees it.
Point the DAW to KeyFlow Out
MainStage, Logic, or any CoreMIDI-aware setup receives the filtered stream from one place.
Play with guardrails
Wrong notes are blocked, harmony-aware notes can pass, and the musical intent stays intact.
Commercial 1.0 baseline
Built for real live keyboard work.
Fast routing, readable controls, and a harmony engine that understands more than a rigid scale checklist.
Scale Filtering
Choose a root and scale, then set Strictness from forgiving to fully locked. Chromatic mode is there when the song needs complete freedom.
Auto Detect Scale
KeyFlow can learn from the notes you play and switch when confidence is high enough.
Allow All Notes
Bypass scale filtering instantly, or combine it with Chord Aware for a chord-compatible palette.
Adaptive Harmony
Minor keys get musical borrowed tones for dominant movement and expressive progressions.
Chord Aware
Lower held notes inform the harmony while melody notes stay protected by the selected scale.
Router and AUv3 modes
Run KeyFlow globally as a CoreMIDI router for complex concerts, or load it as an AUv3 MIDI FX plugin on a single instrument strip.
Product identity
KeyFlow 1.0 is ready for commercial release.
Host app 1.0 build 1. AUv3 1.0 build 1. App Sandbox enabled. App category: Music. AU identity: aumi KFlw ADrv.
Powered by iOLABS
Edition 2026.01
iO
Made by iOLABS
Music tools with a live-performance mindset.
KeyFlow is built by iOLABS, an independent studio focused on practical, stage-ready creative software for musicians, performers, and producers.
- Address
- 53, Kleisthenous str., Agia Paraskevi, 15343, Attiki
- info@iolabs.gr · marketing@iolabs.gr
- Phone/Fax
- +30 211 4029 329
Mac App Store
Coming to macOS.
KeyFlow is being prepared as a paid upfront Mac App Store release for live performers, producers, and keyboardists who want scale-safe MIDI without losing musical feel.
Coming soon on the Mac App Store
Support and privacy
Clear answers before the first note.
Does KeyFlow make sound?
No. It processes MIDI before it reaches your instrument plugin or DAW instrument.
Why doubled notes?
Your DAW may be receiving both the physical keyboard and KeyFlow Out. Use KeyFlow Out for the instrument route.
Does it collect data?
No. KeyFlow 1.0 processes MIDI locally, uses no network services, and includes no analytics or ads.
Where does it fit?
Use the router for whole concerts and sessions. Use AUv3 MIDI FX when one strip needs KeyFlow.
Contact
Need help or want to talk about KeyFlow?
Send a message to iOLABS and include your macOS version, DAW or host, MIDI keyboard, and what you are trying to route.