CODEWITHSUNDEEP
audiokit
STSchoen
STSchoen

Reputation: 21

I've built the libraries from source for macOS Xcode 10.2 but I can't get MIDI out to work. MIDI input seems fine

I'm learning the AudioKit framework and it was necessary to build the framework from source as the 4.2 binaries aren't compatible with the 5.0 compiler in Xcode 10.2. I have not been able to Get MIDI output working to either a physical device or using a virtual port to another app.

I can't get the examples MIDI output playground to work. I get no errors but also no MIDI output I'm using the following:

import AudioKitPlaygrounds
import AudioKit

let midi = AudioKit.midi

midi.openOutput()

import AudioKitUI

class LiveView: AKLiveViewController, AKKeyboardDelegate {

var keyboard: AKKeyboardView!

override func viewDidLoad() {
    addTitle("MIDI Output")

    keyboard = AKKeyboardView(width: 440, height: 100)
    keyboard.delegate = self
    addView(keyboard)

    addView(AKButton(title: "Go Polyphonic") { button in
        self.keyboard.polyphonicMode = !self.keyboard.polyphonicMode
        if self.keyboard.polyphonicMode {
            button.title = "Go Monophonic"
        } else {
            button.title = "Go Polyphonic"
        }
    })
}

func noteOn(note: MIDINoteNumber) {
    midi.sendEvent(AKMIDIEvent(noteOn: note, velocity: 127, channel: 3))
    AKLog("sending note \(note)")
}

func noteOff(note: MIDINoteNumber) {
    midi.sendEvent(AKMIDIEvent(noteOff: note, velocity: 0, channel: 3))
}
}

import PlaygroundSupport
PlaygroundPage.current.needsIndefiniteExecution = true
PlaygroundPage.current.liveView = LiveView()

Upvotes: 1

Views: 62

Answers (1)

STSchoen
STSchoen

Reputation: 21

I figured it out. It turns out that AudioKit was actually sending on channel 4 instead of channel 3. Looks like the channel index is off by 1.
Per the developer MIDI channels are indexed from 0, not 1 so this is expected behavior

Upvotes: 1

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