import com.sun.media.sound.AudioSynthesizerPropertyInfo; //导入依赖的package包/类
public static void main(String[] args) throws Exception {

        // Get default control rate from synthesizer
        AudioSynthesizerPropertyInfo[] p = synth.getPropertyInfo(null);
        for (int i = 0; i < p.length; i++) {
            if (p[i].name.equals("control rate")) {
                control_rate = ((Float) p[i].value).floatValue();
                break;
            }
        }

        // Test LFO under various configurations
        for (int instance = 0; instance < 3; instance++)
            for (int d1 = -3000; d1 < 0; d1 += 1000)
                for (int d2 = 0; d2 < 5000; d2 += 1000)
                    for (int fr = -1000; fr < 1000; fr += 100) {
                        testLFO(true, instance,
                                (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,
                                (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,
                                d2);
                        testLFO(false, instance,
                                (fr == -1000) ? Float.NEGATIVE_INFINITY : fr,
                                (d1 == -3000) ? Float.NEGATIVE_INFINITY : d1,
                                d2);
                    }

    }