/** Configures echo cancellation and noise suppression effects. */
    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    private void configureEffects() {
      if (!AndroidUtils.hasAPI(16)) return;

      AudioSystem audioSystem =
          AudioSystem.getAudioSystem(AudioSystem.LOCATOR_PROTOCOL_AUDIORECORD);

      // Creates echo canceler if available
      if (AcousticEchoCanceler.isAvailable()) {
        AcousticEchoCanceler echoCanceller =
            AcousticEchoCanceler.create(audioRecord.getAudioSessionId());
        if (echoCanceller != null) {
          echoCanceller.setEnableStatusListener(this);
          echoCanceller.setEnabled(audioSystem.isEchoCancel());
          logger.info("Echo cancellation: " + echoCanceller.getEnabled());
        }
      }

      // Automatic gain control
      if (AutomaticGainControl.isAvailable()) {
        AutomaticGainControl agc = AutomaticGainControl.create(audioRecord.getAudioSessionId());
        if (agc != null) {
          agc.setEnableStatusListener(this);
          agc.setEnabled(audioSystem.isAutomaticGainControl());
          logger.info("Auto gain control: " + agc.getEnabled());
        }
      }

      // Creates noise suppressor if available
      if (NoiseSuppressor.isAvailable()) {
        NoiseSuppressor noiseSuppressor = NoiseSuppressor.create(audioRecord.getAudioSessionId());
        if (noiseSuppressor != null) {
          noiseSuppressor.setEnableStatusListener(this);
          noiseSuppressor.setEnabled(audioSystem.isDenoise());
          logger.info("Noise suppressor: " + noiseSuppressor.getEnabled());
        }
      }
    }
 @Override
 public void onEnableStatusChange(AudioEffect effect, boolean enabled) {
   logger.info(effect.getDescriptor() + " : " + enabled);
 }