package music;
class Music {
	private static double pitch = 440;
	/** play note at the current pitch for the given duration
      in milliseconds (the initial pitch is A = 440 Hz) */
	public static void play(int duration) {
		System.out.println("play for " + duration/1000.0 + ": " + pitch );
	}
	/** rest for given duration */
	public static void rest(int duration) {
		System.out.println("rest for " + duration/1000.0);
	}
	/** multiply the pitch frequency by the given factor
      (a factor less than one will lower the pitch) */
	public static void scalePitch(double factor) {
		pitch *= factor;
	}
	/** reset the pitch to note A = 440 Hz */
	public static void reset() {
		pitch = 440;
	}
}