flutter_midi_command

A Flutter plugin for sending and receiving MIDI messages between Flutter and physical and virtual MIDI devices.

Wraps CoreMIDI/android.media.midi/ALSA in a thin dart/flutter layer. Supports

• USB and BLE MIDI connections on Android
• USB, network(session), virtual MIDI devices and BLE MIDI connections on iOS and macOS.
• ALSA Midi on Linux
• Create own virtual MIDI devices on iOS

To install

• Make sure your project is created with Kotlin and Swift support.
• Add flutter_midi_command: ^0.4.8 to your pubspec.yaml file.
• In ios/Podfile uncomment and change the platform to 11.0 platform :ios, '11.0'
• On iOS, After building, Add a NSBluetoothAlwaysUsageDescription and NSLocalNetworkUsageDescription to info.plist in the generated Xcode project.
• On Linux, make sure ALSA is installed.

Getting Started

This plugin is build using Swift and Kotlin on the native side, so make sure your project supports this.

Import flutter_midi_command

import 'package:flutter_midi_command/flutter_midi_command.dart';

• Get a list of available MIDI devices by calling MidiCommand().devices which returns a list of MidiDevice
• Start bluetooth subsystem by calling MidiCommand().startBluetoothCentral()
• Observe the bluetooth system state by calling MidiCommand().onBluetoothStateChanged()
• Get the current bluetooth system state by calling MidiCommand().bluetoothState()
• Start scanning for BLE MIDI devices by calling MidiCommand().startScanningForBluetoothDevices()
• Connect to a specific MidiDevice by calling MidiCommand.connectToDevice(selectedDevice)
• Stop scanning for BLE MIDI devices by calling MidiCommand().stopScanningForBluetoothDevices()
• Disconnect from the current device by calling MidiCommand.disconnectDevice()
• Listen for updates in the MIDI setup by subscribing to MidiCommand().onMidiSetupChanged
• Listen for incoming MIDI messages on from the current device by subscribing to MidiCommand().onMidiDataReceived, after which the listener will recieve inbound MIDI messages as an UInt8List of variable length.
• Send a MIDI message by calling MidiCommand.sendData(data), where data is an UInt8List of bytes following the MIDI spec.
• Or use the various MidiCommand subtypes to send PC, CC, NoteOn and NoteOff messages.
• Use MidiCommand().addVirtualDevice(name: "Your Device Name") to create a virtual MIDI destination and a virtual MIDI source. These virtual MIDI devices show up in other apps and can be used by other apps to send and receive MIDI to or from your app. The name parameter is ignored on Android and the Virtual Device is always called FlutterMIDICommand. To make this feature work on iOS, enable background audio for your app, i.e., add key UIBackgroundModes with value audio to your app's info.plist file.

See example folder for how to use.

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.