I kept hearing the party background music, too...it was surreal. Felt very odd considering the circumstances.
it is very incongruous to have them talking about a potential murder with the music playing. and last night, i don't recall if it was during greta or when Alan was interviewing someone, a girl was SCREAMING in the background. i am sure it was playful screaming, but Lordy, it happened several times and given the subject matter of the interviews i just found it chilling!