Simple Audio query for play back on revisiting tab

In a tabbed interaction template, with three tabs, I have added audio to each layer for each tab. 

When I move from Tab 1 to Tab 2, audio plays Tab 2 and it stops for Tab 1. 

However, when I revisit Tab 1...that is, move back to Tab 1, after visiting Tab 2 or Tab 3, audio does not play. 

How can I make audio play on revisit?

 

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