Deonstruction: Sound

Deconstruction: Sound 'Heidi'

In 'Heidi', two teenagers find a hidden attic in a supplies room and find a series of old things, forgotten about only to come across a small doll segregated from the rest of the items which is when supernatural occurrences begin to happen.

• At the beginning, the trailer consists of non diegetic sound effects of a vacuum. But once the vacuum is switched off diegetic music is played. The music is of an ever ending note which becomes more high pitched and louder as the trailer goes on, foreshadowing that something big is coming.
• From the 30th second a music box begins to play in the background, adding to the common media image as music box are a key convention code in horror possession films. The music box gives the sense of playfulness and joy, which is ironic as it symbolises evil.
• Towards the end of the trailer, starting mainly from the 40th second the music grows to become louder as heavy bass begins to increase the tempo of the music as the story unwraps. This has been used to build tension and engage the audience. Along with the  non-diegetic music, there is also diegetic sounds of people screaming, such as small children and large crowds, adding to the aspect of horror because the it shows the level of discomfort by watching the film.
• The trailer finishes with a subtle group of women singing "I'm not afraid". The subtlety gives a 'spooky' feel and makes the trailer anti-climactic as the build up of tension is falsely released in a slow subtle way to create mystery as it reveals nothing of the plot.