Hi Rakesh,
You don't need enable any thing in appmanifest if your audio file exists in the project.
To play the sound in WinJS, you may need a <audio> tag with the source, your first code seems correct as the HTML below:
<audio>
<source src="uri" type="audioType" />
</audio>
I don't know if some third-party code can work together with Windows Store App, you may need ask owner of Sound.js to see how they can work together with WinJS.
IMPORTANT: I don't think you can play the ogg format with Windows Store App, see
Supported audio and video formats
--James
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Thanks
MSDN Community Support
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