how to attacth effect to audiotrack

[john bean]

hi i am trying to attach effect to system sound i get no errors but the effect does not work

    AudioTrack audioTrack = new AudioTrack(AudioManager.STREAM_MUSIC,
                11025,
                AudioFormat.CHANNEL_CONFIGURATION_STEREO,
                AudioFormat.ENCODING_PCM_16BIT,
                100,
                sessionId);

        PresetReverb reverb = new PresetReverb(1, sessionId);//was 0
        View rOff=view.findViewById(R.id.revoff);
        rOff.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                audioTrack.setVolume(1.0f);
                reverb.setEnabled(false);
            }
        });
        View smallroom=view.findViewById(R.id.smroom);
        smallroom.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                audioTrack.attachAuxEffect(reverb.getId());
                reverb.setPreset(PresetReverb.PRESET_SMALLROOM);
                reverb.setEnabled(true);
                audioTrack.setAuxEffectSendLevel(1.0f);
                audioTrack.setVolume(0.3f);
            }
        });

it gives no errors  in log cat not sure why it does not apply