I apologize if this question is vague, but part of the soundtrack sounds familiar to me but I can't name the song. It has kind of a plaintive, soft melody that sounds like a clarinet, kind of starts "baa baaa bababa."
What civ were you playing as when you heard the song?
Maybe it's The Red Pony?
And it's not a clarinet but an english horn. A instrument close to the oboe with a plaintive sound.