AudioKit 录音机设置，麦克风崩溃，“所需条件为假：mixedDest”

Question

我希望有人可以在这里帮助我。我正在尝试进行基本的录音设置，但 AudioKit 让我崩溃了，我确定这是我的错，而且我做的不对。这是我的设置。在我的viewDidLoad 中，我正在像这样配置 AudioKit：

// Session settings
do {
    AKSettings.bufferLength = .short
    try AKSettings.setSession(category: .playAndRecord, with: .allowBluetoothA2DP)
} catch {
    AKLog("Could not set session category.")
}

AKSettings.defaultToSpeaker = true

// Setup the microphone
micMixer = AKMixer(mic)
micBooster = AKBooster(micMixer)

// Load the test player
let path = Bundle.main.path(forResource: "audio1", ofType: ".wav")
let url = URL(fileURLWithPath: path!)
testPlayer = AKPlayer(url: url)
testPlayer?.isLooping = true

// Setup the test mixer
testMixer = AKMixer(testPlayer)

// Pass the output from the player AND the mic into the recorder
recordingMixer = AKMixer(testMixer, micBooster)
recorder = try? AKNodeRecorder(node: recordingMixer)

// Setup the output mixer - only pass the player NOT the mic
outputMixer = AKMixer(testMixer)

// Pass the output mixer to AudioKit
AudioKit.output = outputMixer

// Start AudioKit
do {
    try AudioKit.start()
} catch {
    print("AudioKit did not start! \(error)")
}

应用程序构建良好，但一旦我触发recorder.record()，应用程序就会崩溃并显示以下消息：

要求条件为假：mixingDest。

我真的不想将麦克风传递到扬声器输出，但我确实想录制它。

我希望能够通过“testPlayer”播放文件，通过扬声器听到它，同时能够记录“testPlayer”和麦克风的输出，而无需将麦克风通过扬声器。

我确信这是可行的，但我不太了解这些事情应该如何工作以知道我做错了什么。

非常感谢任何帮助！

Answer 1

好的，所以在与 AudioKit 人员交谈后，我发现问题是因为我的录音混音器没有连接到 AudioKit.output。为了通过混音器提取音频，它需要连接到 AudioKit.output。

为了使我的 recordingMixer 的输出静音，我必须创建一个已静音的虚拟录音混音器，并将其传递给 outputMixer。

请参阅下面的更新示例：

// Session settings
do {
    AKSettings.bufferLength = .short
    try AKSettings.setSession(category: .playAndRecord, with: .allowBluetoothA2DP)
} catch {
    AKLog("Could not set session category.")
}

AKSettings.defaultToSpeaker = true

// Setup the microphone
micMixer = AKMixer(mic)
micBooster = AKBooster(micMixer)

// Load the test player
let path = Bundle.main.path(forResource: "audio1", ofType: ".wav")
let url = URL(fileURLWithPath: path!)
testPlayer = AKPlayer(url: url)
testPlayer?.isLooping = true

// Setup the test mixer
testMixer = AKMixer(testPlayer)

// Pass the output from the player AND the mic into the recorder
recordingMixer = AKMixer(testMixer, micBooster)
recorder = try? AKNodeRecorder(node: recordingMixer)

// Create a muted mixer for recording audio, so AudioKit will pull audio through the recording Mixer, but not play it through the output.
recordingDummyMixer = AKMixer(recordingMixer)
recordingDummyMixer.volume = 0

outputMixer = AKMixer(testMixer, recordingDummyMixer)

// Pass the output mixer to AudioKit
AudioKit.output = outputMixer

// Start AudioKit
do {
    try AudioKit.start()
} catch {
    print("AudioKit did not start! \(error)")
}

我希望这对将来的人有所帮助。