private void equalizeSound() {
//   set up the spinner
        ArrayList<String> equalizerPresetNames = new ArrayList<String>();
        ArrayAdapter<String> equalizerPresetSpinnerAdapter
                = new ArrayAdapter<String>(this,
                android.R.layout.simple_spinner_item,
                equalizerPresetNames);
        equalizerPresetSpinnerAdapter
                .setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
        Spinner equalizerPresetSpinner = (Spinner) findViewById(R.id.spinner);

        equalizerPresetNames.add("Custom");

//        get list of the device's equalizer presets
        for (short i = 0; i < mEqualizer.getNumberOfPresets(); i++) {
            equalizerPresetNames.add(mEqualizer.getPresetName(i));
        }

        equalizerPresetSpinner.setAdapter(equalizerPresetSpinnerAdapter);

//        handle the spinner item selections
        equalizerPresetSpinner.setOnItemSelectedListener(new AdapterView
                .OnItemSelectedListener() {

            @Override
            public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
                //first list item selected by default and sets the preset accordingly
                mEqualizer.usePreset((short) position);
//                get the number of frequency bands for this equalizer engine
                short numberFrequencyBands = mEqualizer.getNumberOfBands();
//                get the lower gain setting for this equalizer band
                final short lowerEqualizerBandLevel = mEqualizer.getBandLevelRange()[0];

//                set seekBar indicators according to selected preset
                for (short i = 0; i < numberFrequencyBands; i++) {
                    short equalizerBandIndex = i;
                    SeekBar seekBar = (SeekBar) findViewById(equalizerBandIndex);
//                    get current gain setting for this equalizer band
//                    set the progress indicator of this seekBar to indicate the current gain value
                    seekBar.setProgress(mEqualizer.getBandLevel(equalizerBandIndex) - lowerEqualizerBandLevel);
                }
            }

            @Override
            public void onNothingSelected(AdapterView<?> parent) {
//                not used
            }
        });
    }