Help with Airport Express and Airtunes

I am having several issues. I have a Time Capsule set up as the router at my home with an Airport Express connected to it wirelessly.

In the configuration, the Airport Express is configured to extend the existing network created by the Time Capsule. With that in mind, should I still be able to see the Airport Express in the device list in the Airport Utility?

Makes me wonder whether the Airport Express can serve as a network extender and at the same time, deliver airtunes functionality wirelessly.

Thanks. Any help will be appreciated.

You should be able to see both devices in the Airport Utility, otherwise you wouldn't be able to administer them. I've never tried to use one as an extender though.