code: def open_sensor(
          self,
          input_source: str,
          output_dest: Optional[str] = None,
          extra_cmd: Optional[str] = None,
      ) -> Coroutine:
          
          command = ["-vn", "-filter:a", "silencedetect=n={}dB:d=1".format(self._peak)]
  
          # run ffmpeg, read output
          return self.start_worker(
              cmd=command,
              input_source=input_source,
              output=output_dest,
              extra_cmd=extra_cmd,
              pattern="silence",
          )
docs: Open FFmpeg process for read autio stream.
  
          Return a coroutine.