Development Flash ActionScript

package {
    import flash.display.Sprite;
    import flash.system.Capabilities;
    public class Main extends Sprite {
        
        public function Main() {
            if (Capabilities.hasAudio) {
                trace ("Audio OK!");
            } else {
                trace("Audio not available");
            }
            if (Capabilities.hasStreamingAudio) {
                trace ("Streaming OK!");
            } else {
                trace("Streaming not available");
            }
        }
    }
}