diff --git a/gswaMIDIControllersManager/gswaMIDIControllerInput.js b/gswaMIDIControllersManager/gswaMIDIControllerInput.js
index 6360d70..fec6201 100644
--- a/gswaMIDIControllersManager/gswaMIDIControllerInput.js
+++ b/gswaMIDIControllersManager/gswaMIDIControllerInput.js
@@ -1,40 +1,27 @@
 "use strict";
 
 class gswaMIDIControllerInput {
-	constructor( portID, name, input, sysexEnabled ) {
-		this.portID = portID;
-		this.name = name;
-		this.input = input;
-		this.sysexEnabled = sysexEnabled;
-		this.input.onmidimessage = this.#midiEvents.bind( this );
-		this.listeners = {
-			onNoteOn: [],
-			onNoteOff: [],
-		};
-	}
+	#sysex = false;
+	#onNoteOn = null;
+	#onNoteOff = null;
 
-	$getInput() {
-		return this.input;
-	}
-	$onNoteOnAdd( cb ) {
-		this.listeners.onNoteOn.push( cb );
+	constructor( input, sysex, on ) {
+		this.#sysex = sysex;
+		this.#onNoteOn = on.$onNoteOn;
+		this.#onNoteOff = on.$onNoteOff;
+		input.onmidimessage = this.#onmidimessage.bind( this );
 	}
-	$onNoteOffAdd( cb ) {
-		this.listeners.onNoteOff.push( cb );
-	}
-	#midiEvents( e ) {
-		if ( !this.sysexEnabled && e.data.length !== 3 ) {
-			console.log( "GSLog : Invalid midi event" );
-		} else if ( this.#isNoteOn( e.data[ 0 ], e.data[ 2 ] ) ) {
-			this.listeners.onNoteOn.forEach( cb => cb( e.data ) );
-		} else if ( this.#isNoteOff( e.data[ 0 ], e.data[ 2 ] ) ) {
-			this.listeners.onNoteOff.forEach( cb => cb( e.data ) );
+
+	#onmidimessage( e ) {
+		if ( !this.#sysex && e.data.length !== 3 ) {
+			console.warn( "gswaMIDIInput: Unrecognized midi message", e );
+		} else {
+			const [ msg, key, vel ] = e.data;
+
+			switch ( msg ) {
+				case 0x90: this.#onNoteOn( key ); break;
+				case 0x80: this.#onNoteOff( key ); break;
+			}
 		}
 	}
-	#isNoteOn( channel, velocity ) {
-		return ( channel === MIDI_CHANNEL_NOTEON && velocity !== 0 );
-	}
-	#isNoteOff( channel, velocity ) {
-		return ( channel === MIDI_CHANNEL_NOTEOFF || velocity === 0 );
-	}
 }
diff --git a/gswaMIDIControllersManager/gswaMIDIControllerOutput.js b/gswaMIDIControllersManager/gswaMIDIControllerOutput.js
index b80ac5a..13575ec 100644
--- a/gswaMIDIControllersManager/gswaMIDIControllerOutput.js
+++ b/gswaMIDIControllersManager/gswaMIDIControllerOutput.js
@@ -1,18 +1,16 @@
 "use strict";
 
 class gswaMIDIControllerOutput {
-	constructor( portID, name, output, sysexEnabled ) {
-		this.portID = portID;
-		this.name = name;
-		this.output = output;
-		this.sysexEnabled = sysexEnabled;
-	}
+	#port = null;
+	#sysex = false;
 
-	$getOutput() {
-		return this.output;
+	constructor( output, sysex ) {
+		this.#port = output;
+		this.#sysex = sysex;
 	}
+
 	#send( bytes ) {
-		this.output.send( bytes );
+		this.#port.send( bytes );
 	}
 	#sendToTarget( bytes, targetOutput ) {
 		targetOutput.send( bytes );
diff --git a/gswaMIDIControllersManager/gswaMIDIControllersManager.js b/gswaMIDIControllersManager/gswaMIDIControllersManager.js
index 0e48176..e555268 100644
--- a/gswaMIDIControllersManager/gswaMIDIControllersManager.js
+++ b/gswaMIDIControllersManager/gswaMIDIControllersManager.js
@@ -1,8 +1,5 @@
 "use strict";
 
-const MIDI_CHANNEL_NOTEON = 0x90;
-const MIDI_CHANNEL_NOTEOFF = 0x80;
-
 class gswaMIDIControllersManager {
 	#uiKeys = null;
 	#midiAccess = null;
@@ -17,19 +14,11 @@ class gswaMIDIControllersManager {
 	$setPianorollKeys( uiKeys ) {
 		this.#uiKeys = uiKeys;
 	}
-	$linkToPianoroll( midiCtrl ) {
-		midiCtrl.$onNoteOnAdd( this.#pianorollLiveKeyPressed.bind( this ) );
-		midiCtrl.$onNoteOffAdd( this.#pianoRollLiveKeyReleased.bind( this ) );
-	}
-	$unlinkFromPianoroll( midiCtrl ) {
-		midiCtrl.$onNoteOnRemove( this.#pianorollLiveKeyPressed.bind( this ) );
-		midiCtrl.$onNoteOffRemove( this.#pianoRollLiveKeyReleased.bind( this ) );
+	#pianoRollLiveKeyReleased( key ) {
+		this.#uiKeys?.$midiKeyUp( key );
 	}
-	#pianoRollLiveKeyReleased( midiCtrlData ) {
-		this.#uiKeys?.$midiKeyUp( midiCtrlData[ 1 ] );
-	}
-	#pianorollLiveKeyPressed( midiCtrlData ) {
-		this.#uiKeys?.$midiKeyDown( midiCtrlData[ 1 ] );
+	#pianorollLiveKeyPressed( key ) {
+		this.#uiKeys?.$midiKeyDown( key );
 	}
 
 	// .........................................................................
@@ -57,15 +46,15 @@ class gswaMIDIControllersManager {
 		switch ( port.type ) {
 			case "input":
 				if ( !this.#midiCtrlInputs.has( port.id ) ) {
-					const ctrl = new gswaMIDIControllerInput( port.id, port.name, port, sysexEnabled );
-
-					this.#midiCtrlInputs.set( port.id, ctrl );
-					this.$linkToPianoroll( ctrl );
+					this.#midiCtrlInputs.set( port.id, new gswaMIDIControllerInput( port, sysexEnabled, {
+						$onNoteOn: this.#pianorollLiveKeyPressed.bind( this ),
+						$onNoteOff: this.#pianoRollLiveKeyReleased.bind( this ),
+					} ) );
 				}
 				break;
 			case "output":
 				if ( !this.#midiCtrlOutputs.has( port.id ) ) {
-					this.#midiCtrlOutputs.set( port.id, new gswaMIDIControllerOutput( port.id, port.name, port, sysexEnabled ) );
+					this.#midiCtrlOutputs.set( port.id, new gswaMIDIControllerOutput( port, sysexEnabled ) );
 				}
 				break;
 		}