idk.cs

int latency = AudioSettings.outputSampleRate / 10;

AudioClip clip = Microphone.Start(device, true, 1, AudioSettings.outputSampleRate);
int last = 0;

int dist(int samples, int start, int end) {
  if (end >= start) return end - start;
  return (end + samples) - start; // handle wrapping
}
while(true) {
  int current = Microphone.GetPosition(device);
  int delta = dist(clip.samples, last, current);
  if (delta > latency) {
    // get a sample
    clip.GetData(data, last);
    last = current;
  }
}