Sound on many apps stopped working

I'm having the same problem but only on one app, an off-road rally racing game called 2XL Rally HD. Really annoying because the game is a ton of fun, but with no sound it loses a bit of it's luster.

iaddict said:

This sounds strange to me but the slider button down by the sound up/down control was turned off or in the wrong setting. Moved it and all the sound now works. I really don't see why some sound would work and others would not. Mystery somewhat solved.

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That is because that switch turns off system sounds. Some sounds in apps are system sounds, while others are, for lack of a better term, regular sounds. You can test the difference by playing music from the iPod app, then starting another app that uses sound. If the music keeps playing, and the sound from the app overlaps the music, those are system sounds. If the music fades away when the app sounds start, those are regular sounds.

Thanks guys for guidance, I just fixed mine, it had the mute switch off, although some applications would "sound" regardless.

yeah, I had the same problem with mine, when I was reading something on here about 4.3 features i read that you could do either mute or orientation lock with it, figured I'd check to see if it was in the orange position, muted....sure enough it was, got the sound back....I sure felt like a dumba$$