gistfile1.txt

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CODE:
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import com.xtaudio.xt.*;

public class RenderSimple {

    static double phase = 0.0;
    static final double FREQUENCY = 660.0;
    static final XtFormat FORMAT = new XtFormat(new XtMix(48000, XtSample.FLOAT32), 0, 0, 1, 0);

    static void render(XtStream stream, Object input, Object output, int frames,
                       double time, long position, boolean timeValid, long error, Object user) {
        System.out.println("render");
        for (int f = 0; f < frames; f++) {
            phase += FREQUENCY / FORMAT.mix.rate;
            if (phase >= 1.0)
                phase = -1.0;
            ((float[]) output)[f] = (float) Math.sin(phase * Math.PI);
        }
    }

    public static void main(String[] args) throws Exception {
        try (XtAudio audio = new XtAudio(null, null, null, null)) {
            XtService service = XtAudio.getServiceBySetup(XtSetup.PRO_AUDIO);
            try (XtDevice device = service.openDevice(5)) {
                System.out.println(device.getName());
                if (device != null && device.supportsFormat(FORMAT)) {
                    XtBuffer buffer = device.getBuffer(FORMAT);
                    try (XtStream stream = device.openStream(FORMAT, true, false,
                            buffer.current, RenderSimple::render, null, null)) {
                        System.out.println("starting");
                        stream.start();
                        System.out.println("started");
                        Thread.sleep(10000);
                        System.out.println("stopping");
                        stream.stop();
                    }
                }
            }
        }
    }
}

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OUTPUT:
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Voicemeeter Virtual ASIO
starting
started

Process finished with exit code -1073741819 (0xC0000005)