Watching the man playing the violin through the window made the main character think that she was dreaming. Listening to the music during the course of this type of emotional state that she was in made her stay calm and find herself in a type of dreamland. The music would take her somewhere else besides reality. Music can take a person elsewhere, in the future, in the past, and in la la land. Even though music can be calming and soothing to the soul, it can make a person believe that she is in a different dimension.
Music can make a person feel good and make a person feel bad.
The stench of the body was going all through the house was a realist element. When the neighbor arrived, she could smell the body right away. The realistic element was definitely here. The stench of the body was a dead giveaway that it was real. The stench of a decaying body isn't the best smell in the world.