Bond summed it up nicely.
There was a podcast called Mysterious Universe which had some really good voice to music transitions. The guy who ran it was really serious into editing and getting the perfect sounding show. Got himself a booth too so that his voice was as clear as possible. Was such a perfectionist that he eventually couldn't keep up with schedule (it was a paid show later on), stopped the show and took all the episodes off his site. I miss it.
One of the last eps:
http://www.podtrac.com/pts/redirect....universe92.mp3
Used to be a lot heavier on the music but I can't find the older eps online.