As far as I know, Christopher Tyng scored every episode (somebody correct me if wrong). When you're not hearing a song, you're hearing his original score. It's unreleased. Not even one cue on his new website.
The name is irrelevent, since it's unreleased. It's only releveant if a CD happens, they if he named the cues, the names will be on the cue sheets.
When he's not doing his typically orchestral style scoring on "Futurama" and some other works, once in a while he'll do a modern, hip sounding score like his "Knight Rider" scoring, a vaguely similar scoring approach on the film "Bookies".
And when things appeared to get better, they got worse, and everyday was a day to cry.