The audio sample we ship is using the Cordova API, which is not supported in the simulator out of the box and currently we have not made the required changes for it to work in the simulators.
As HTML5 defines a new element which specifies a standard way to embed an audio file on a web page, the <audio> element, we suggest giving it a try. Ogg files in this case should work in our simulators.
the Telerik team
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