CODEWITHSUNDEEP
iosswiftmidiaudiokit
omarghanem542
omarghanem542

Reputation: 11

sending sound files as MIDI notes using AudioKit on IOS

i have an IOS app that use AudioKit to play AudioFiles for the sound related to the Pad. So, I want the app to support MIDI files. I want to know how to export these sound files using MIDI to play them on apps like Garage band

Upvotes: 1

Views: 786

Answers (1)

c_booth
c_booth

Reputation: 2225

To send MIDI:

// to send between app, create a virtual port:
AudioKit.midi.createVirtualOutputPort()
// you can specify which outputs you want to open, or open all by default:
AudioKit.midi.openOutput()

// to send a noteOn message:
AudioKit.midi.sendNoteOnMessage(noteNumber: aNoteNumber, velocity: aVelocity)

// to send a noteOff message:
AudioKit.midi.sendNoteOffMessage(noteNumber: aNoteNumber, velocity: 0)

To receive MIDI, you need to have a class which implements the AKMIDIListener protocol (it could even be your ViewController, but probably shouldn't be). This class lets you implements methods such as receivedMIDINoteOn to handle incoming events.

class ClassThatImplementsMIDIListener: AKMIDIListener {
    func receivedMIDINoteOn(noteNumber: MIDINoteNumber,
                            velocity: MIDIVelocity,
                            channel: MIDIChannel) {
        // handle the MIDI event in your app, e.g., trigger you sound file
    }
}

Setting it up is easy:

// if you want to receive midi from other apps, create a virtual in
AudioKit.midi.createVirtualInputPort()

// you can specify which inputs you want to open, or open them all by default
AudioKit.midi.openInput()

// add your listener
AudioKit.midi.addListener(classImplementingMIDIListener)

Upvotes: 2

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