@Test
    public void testSaveAndLoad_HighPassFilter() {
        AssetManager assetManager = new DesktopAssetManager(true);

        HighPassFilter f = new HighPassFilter(.5f, .5f);
        HighPassFilter copy = BinaryExporter.saveAndLoad(assetManager, f);

        float delta = 0.001f;
        Assert.assertEquals(f.getVolume(), copy.getVolume(), delta);
        Assert.assertEquals(f.getLowFreqVolume(), copy.getLowFreqVolume(), delta);
    }
Tests serialization and de-serialization of a {@code HighPassFilter}.
jme3-core/src/test/java/com/jme3/audio/AudioFilterTest.java