screen.resolution.set (512,384)
@sound = sound.load ("error.wav")
text.display ("Press a key to exit.",CENTER,350)
repeat ()
%freq+=1000
sound.play (@sound,CHANNEL_1)
sound.frequency.set (CHANNEL_1,%freq)
text.display ("The current frequency of the sound is : " +STR (sound.frequency.get (CHANNEL_1)),CENTER,10)
time.wait (0.1)
until (keyboard.get ())
script.stop ()