/** Frees all system resources, which are bounded to this object. */
@Override
public void close() {
super.close();
if (filter1 != null) {
filter1.close();
}
filter1 = null;
if (filter2 != null) {
filter2.close();
}
filter2 = null;
if (equalizer != null) {
equalizer.close();
}
equalizer = null;
if (spline != null) {
spline.close();
}
spline = null;
}
