You can play for the length of the specified sound of a specific frequency.
Frequency (Hz) = {"20", "25", "50", "100", "200", "300", "400", "500", "750", "1000", "1250", "2500", "5000", "7500", "10000", "12500", "15000", "16000", "17000", "18000", "19000", "20000"};
Length (msec) = {"Continue", "10", "25", "50", "100", "250",
"500", "750", "1000", "1500", "2000", "3000", "5000"};
* 'Continue' will continue to play as long as you press the play button.