fix sound not playing under certain operations (smartphone) #209
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I found a
WebAudio._onVisibilityChange
problem.WebAudio._onHide
andWebAudio._onShow
adjust the volume when the browser visibility changes for Smartphone (especially Android OS).But,
WebAudio._onHide
and `WebAudio._onShow have different fade duration.The following operations will cause problems.
WebAudio._onHide
)When this operation is performed, the fade-out time will be longer than the fade-in time.
Then the sound will be muted all the time 😢