It comes as no surprise that audio files are needed to make a great slideshow. What's currently lacking in Photopia is a full blown selection of "free" sound/music tracks so that we can build our slideshows with music that is not impeded by legallities. Photodex did have this available. My understanding is that Photopia is hard at work trying to get this same condiment available to us. I also understand that getting a deal with a company is a major headache. They are working on it. All great things come in time so, let's give them the time they need.
...Steve