I've been removing and replacing the old insulation in my mom's attic. The house was built in the 50s. There are wires running all over the attic, on top of the joists, and they look like speaker-wire. Was this some weird form of TV antenna at some period in time? That occurred to me today when I saw TV antenna wire laid out in an area of the attic. I guess someone could have run speakers into all the rooms of the house? Any thoughts?