Illumination is like a welcome sign. The potential buyer will feel a glowing warmth when you turn on all your lights for an evening inspection. Three's a crowd. Avoid having too many people present during inspections. The potential buyer will feel like an intruder and will hurry through the house.
Music is mellow.
But not when showing a house. Turn off the blaring radio or television. Let the salesman and buyer talk, free of disturbances. Silence is golden. Be courteous but don't force conversation with the potential buyer.