public void render(String peerId, AudioBuffer echo)
 {
     if (IsSupported)
     {
         if (AudioMixer != null)
         {
             AudioMixer.AddSourceFrame(peerId, new AudioBuffer(echo.Data, echo.Index, echo.Length));
         }
         else
         {
             AcousticEchoCanceller.Render(echo.Data, echo.Index, echo.Length);
         }
     }
 }