如何使用 AudioKit 編寫從鍵盤打印所有 MIDI 音符的 Mac 命令行應用程序？

Question

我想編寫一個簡單的程序來打印從鍵盤輸入的音符。 我已經在下面顯示了一些內容，但是程序將完成並且不會在那里等待 MIDI 信號。 有任何想法嗎？ 謝謝

主文件：

import Foundation
import AudioKit

let midi = MIDI()
midi.openInput()
let receiver = MIDIReceiver()
midi.addListener(receiver)

print("Done")

MIDIReceiver 類：

import Foundation
import AudioKit
import CoreMIDI

class MIDIReceiver: MIDIListener {
func receivedMIDINoteOn(noteNumber: MIDINoteNumber, velocity: MIDIVelocity, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(noteNumber)
}

func receivedMIDINoteOff(noteNumber: MIDINoteNumber, velocity: MIDIVelocity, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(noteNumber)
}

func receivedMIDIController(_ controller: MIDIByte, value: MIDIByte, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(controller)
}

func receivedMIDIAftertouch(noteNumber: MIDINoteNumber, pressure: MIDIByte, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(noteNumber)
}

func receivedMIDIAftertouch(_ pressure: MIDIByte, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(pressure)
}

func receivedMIDIPitchWheel(_ pitchWheelValue: MIDIWord, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(pitchWheelValue)
}

func receivedMIDIProgramChange(_ program: MIDIByte, channel: MIDIChannel, portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(program)
}

func receivedMIDISystemCommand(_ data: [MIDIByte], portID: MIDIUniqueID?, offset: MIDITimeStamp) {
    print(data)
}

func receivedMIDISetupChange() {
    print("SetupChange")
}

func receivedMIDIPropertyChange(propertyChangeInfo: MIDIObjectPropertyChangeNotification) {
    print(propertyChangeInfo)
}

func receivedMIDINotification(notification: MIDINotification) {
    print(notification)
}


}

Answer 1

萊納斯，

請查看 SwiftUI 中的 AudioKit v5 Cookbook。 它包括一個 MIDI 監視器示例，可打印出您的應用程序收到的所有 MIDI 音符、程序更改和連續控制編號：

https://github.com/AudioKit/Cookbook/blob/main/Cookbook/Cookbook/Recipes/MIDIMonitor.swift

小心，
標記

Answer 2

只需讓程序繼續運行直到發生按鍵，例如按“q”或“esc”鍵。