Music is a funny thing, it can either make your radio stories sound great or awful. You just have to be careful. There are certain types of stories and audio pieces that could benefit from having music accompanying them and sometimes a lack of music or sound is the way to go. Check out Michael Schubert's (Bay FM, Byron Bay) piece entitled 'In Search of Silence' to see what we mean about the lack of sound/music thing.
There are certain types of audio pieces that it would be inappropriate to score and others where it is awesome.
It's important to know what to do if you want to do the best you can with music in your audio. Like what benefit composing your own music will have over finding free sound somewhere on the internet. Or the benefit of using music that comes from the same album.
Read more about music in your audio via NPR Training.