private string GetFileName()
{
var deviceName = _captureDevice.GetType().Name;
var sampleRate = $"{_captureDevice.WaveFormat.SampleRate / 1000}kHz";
var channels = _captureDevice.WaveFormat.Channels == 1 ? "mono" : "stereo";
return($"{deviceName} {sampleRate} {channels} {DateTime.Now:yyy-MM-dd HH-mm-ss}.wav");
}