call sound cost double time of its parameter

[whymath]

data test;
  call sound(440,1000);
run;

When running a call sound routine, it costs SAS double time of its second parameter to finish the data step:

NOTE: The data set WORK.TEST has 1 observations and 0 variables.
NOTE: DATA statement used (Total process time):
      real time           2.03 seconds
      cpu time            0.00 seconds

And the voice can be heard only for 1 second, another 1 second is blank.

Why this happens? If I don't get it wrong, a SASor can write single-note very fluently songs in the old time.

[Kurt_Bremser]

This obviously depends on environment:

 69         data _null_;
 70           call sound(440,1000);
 71         run;
 
 NOTE:  Verwendet wurde: DATA statement - (Gesamtverarbeitungszeit):
       real time           0.00 seconds
       user cpu time       0.00 seconds
       system cpu time     0.00 seconds

SAS On Demand, where sound makes no sense anyway.