Play sound when zooming into specified region in pano?

Hi everyone,

I have an idea I'm not sure is possible with krpano.

What I'd like to do is have a sound play whenever someone looks at a certain area of a pano, and then zooms in on it. For example, a bird call plays when you look at a bird and zoom in. Is there a way to use a listener in krpano to accomplish this, maybe by setting a check for h and v lookat regions and then playing a sound if the fov goes above a certain amount? Or would constantly doing an onviewchange check be too laggy performance-wise?

Thanks in advance for any insight you might have!

Thank you for your response, Klaus -- I will give this a try and report back with some results. Much appreciated!