I’m using apple’s AVAudioEngine code like this:

var audioEngine = AVAudioEngine()
audioEngine.inputNode.installTap { [buffer, when] in
   let waveform = myGetWaveform(buffer)
   Task {
      Something.shared.doSomethingWith(waveform)
   }
}

I do this because Something is an actor, and it’s hard for me to change it. But of course, the problem is that those Tasks can be executed out of order. That would be bad – I need them to be executed in order. How can I guarantee they execute in order? I suppose this could be applied to any synchronous code that can’t change the caller to be async. I can’t seem to find any way to inject serialization into async actor code…