I don't think there's any way to easily hack it to use your existing elements right now, though I would like to add an option to allow for changing methods in cases like this.
I did find this stackoverflow code that might work, but I haven't tried it and seems pretty iffy that it would always be supported.
The workaround for right now to use the HTML5 <audio> method that isn't based on the mute position is that you would need to write some code to trigger playback instead of using Hype's built-in audio support. You can see how to it in this post:
This doesn't make much sense to me; you don't have different layouts or anything. Also, the document does work for me on iOS -- when I touch the eyes it does say the right sound.
(I believe the drum example is old -- the audio APIs have been in flux with browsers and that was exported in an older version of Hype. It has been updated!)