iOS: Some millisecond break, when playing audio

[Horst]

Hi,

i make a game with phonegap. But i have a little problem with sound.
Every time, when i play a sample, i get a little interrupt. Only some
milliseconds, but while playing the game this is very annoying. In the
game coins can be collected, every time the player gets one, i play a
"pling". And the game freezes for some ms.

I have tried to use wav instead of mp3. No change.
I have tried to remove callback functions and use only
coin = new Media('sfx/coin.wav');
and
coin.play();
But nothing helps. I havent tested lately, but i think on android i
hadn't this problem. I use PhoneGap 1.1.0 at moment. Tested on iPad2
and iPod Touch with iOS 4 and 5.

Has anyone an idea, how i can play ingame audio?

best regards
Horst

[Anil Kumar]

It is due to loading your sound in memory and cpu becomes/halt for ms.

You can do preloading all sounds and then play any of them would not come this issue

you may try

 introSoundPlayer = new Media("raw/intro.mp3",function (){ Alert("Sound Loaded"); 

    // here can initialize your app and other components

},

    function (){ Alert("Sound Loading Error"); }

);

introSoundPlayer.play();

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[Horst]

Hello Anil,

thanks, but i get the halt every time, i play the sound. Not only the
first time. In my example above the coin=new Media... is called in
init routine and the coin.play() every time i play the sound. So i
think it should already be loaded after first play.

best regards
Horst

[Giacomo Balli]

are you sure the first ms of the sound file is not silent?

[Horst]

@Giacomo: The problem is not a delay in playing. It is a short halt of
the complete app. In a normal app this should be an issue. But in a
game its really annoying, when every sound makes a break.

[Horst]

My error. 3 days before my post an issue was already opened:
https://issues.apache.org/jira/browse/CB-59

[KyrePh]

If you're trying to play back sound effects, use the SoundPlug plugin.
Media is more useful for BGM audio than effects if you're trying to
make a game in PhoneGap.

[Matteo]

try to defer the call to the sound function.

Eg:

setTimeout(function() { playSound(); }, 0);

Or you may also try to force browser repaint querying offsetHeight for the elements being updated.

[Horst]

Hello Matteo,

i have already read your article: http://cubiq.org/build-and-publish-an-html5-game-for-ipad-part-3

But i have submitted my game yesterday to apple. My testers are
satisfied with the performance.

best regards
Horst

[Matteo]

any sneak preview?

[Horst]

;-)
You can use the Android Version as preview: https://market.android.com/details?id=net.klier.dduck
But i have done much improvements to iOS, because the css animations
are so smooth. Now i port the new features back to the android
version.