Iteration #1: Playing Sounds Using a Single Object
We just described the first iteration of the dynamic audio code. It works by
attempting to call the play()
function of both shootSound and
explodeSound as often as necessary.
This appears to work at first, but if you listen carefully (and this is
apparent on some browsers more than others), the sounds start to play
“off,” or not play at all. This is because we are using a single object
and attempting to play and replay the same sound over and over. A single
HTMLAudioElement was not designed to
operate this way. You can test this example in the code distribution by
running CH7EX6.html in your
HTML5-compliant web browser. Press the fire button as quickly as
possible, and listen to when and how the sounds play. After a bit, they
start to play at the wrong time, don’t finish, or don’t play at all.
Figure 7-7 shows what
the first iteration of Space Raiders looks like in
a web browser.
Figure 7-7. Space Raiders playing sounds from two objects
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