Want to sell a document as a Product, but I want the customer to have the ability to play an audio file, of somone speaking (not music) describing the product (document file) that they can purchase.

How can I add an image to a Product information, where the image, when selected, would play the audio file? Or optionally the customer can download the audio file to listen to at another time.

Or how can add a link to the audio file, in the Product information, or what other way would be feasible/simple?

Can anyone help me with this?