AudioKit提供了一个API来协调音频处理的计时，以使它们在同步时进行。这个API被称为'bounce recording sync”，即'音频回归记录同步”。这个功能可以通过以下代码示例实现：

let audioKit = AudioKit() 

let player = AKPlayer() 
audioKit.output = player 

let recorder = try AKNodeRecorder(node: player) 

player.syncEnabled = true 
player.play() 

try recorder.record() 
sleep(3) 

recorder.stop() 
let audioFile = try AKAudioFile(forReading: recorder.audioFile) 

let outputURL = URL(fileURLWithPath: NSTemporaryDirectory()).appendingPathComponent("outputFile") 
let exportSession = AVAssetExportSession(asset: audioFile.avAsset, presetName: AVAssetExportPresetAppleM4A) 
exportSession?.outputFileType = .m4a 
exportSession?.outputURL = outputURL 

exportSession?.exportAsynchronously { 
    switch exportSession?.status { 
    case .completed: 
        print("Exported to \(outputURL.absoluteString)") 
    default: 
        print("Export failed with error: \(exportSession?.error?.localizedDescription ?? "")") 
    } 
}

这个示例将一个AKPlayer节点设置为AudioKit的输出节点。然后，它在该节点上启用了同步，并让该节点播放音频。它使用AKNodeRecorder节点记录播放器的输出，并将其导出到M4A格式的文件中。

请注意，上述示例仅仅是演示'AudioKit bounce recording sync”功能的示例，并不能完全满足您的需求。具体实现应根据您的需求来定制。