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Bug
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    Resolution: Done
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P1: Critical
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    6.2.3, 6.4.0 FF
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    None
 
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        9c6ae9afdd (qt/qtmultimedia/dev) 55eb4ad820 (qt/qtmultimedia/6.3) dfb0baa569 (qt/qtmultimedia/6.2) dfb0baa569 (qt/qtmultimedia/6.2.4) dfb0baa569 (qt/tqtc-qtmultimedia/6.2)
 
The attached example loads the same .wav file in MediaPlayer and SoundEffect. There is a button for each which calls play() on the respective component.
With MediaPlayer, the sound plays fine, whereas with SoundEffect it does not.
There's also an error in the console:
QSoundEffect(qaudio): Error decoding source targethit.wav
Tested and reproduced on both 6.2 branch and dev branch.