Music within a trailer is known as a subset of production music, this is the background music also known as non digetic it is used for film previews to create enigma and enlightenment in regard to the plot. However is not always necessarily used in the actual film production. The purpose of using music in a trailer is to highlight and incorporate the specific message that is being sent through the teaser trailer about the actual film itself. Originally, in our trailer we wanted just a piano playing lightly to express sadness and compassion, however now there are various instruments being used such as a piano, brass, strings and flute. A range of synthesizers were used to express an element of atmosphere and mood within the trailer to relate to the genre of drama, this was done using the software logic 8 available on Apple laptops/computers. To compose our background music we organised a professional music composer to create our background music. Through the use of synthesizing the instruments they no longer express just their original sound, they have now been improved through experimenting with the pitch,tempo,dynamic and its duration to coincide with the theme and the scenes within the trailer. For each scene in the trailer the audio had to relate to the visual scenes for example in the park scene where the mother is playing with her son the music that accompanies this scene is soft gentle and playful up beat music however when the father is seen watching the mother and son in the park the music changes and become more sinister through the change in dynamics.
The sound effects used in the trailer are also non diegetic as they are used to create a dramatic effect. For our studio ident we have a video recording of an eye blinking and have used a sound effect of blink, because through research we have found that to really draw an audience in, if there is an eye blinking it is more effective to have the sound of the blink to create emphasis on the ident. We also use a heartbeat within our trailer to show tension building and realisation of her missing son. Footsteps are used to highlight the fact someone is following them although this is shown through the camera as if it is hand held it just adds to the effect we are trying to create. The bottle smashing simply expresses the noise after the mother has been hit with the wine bottle.
There is a use of diegetic sound used in our production through the use of dialogue to create a storyline within the trailer.The sound of door slams are also diegetic as there was no need to produce a sound effect for this particular part as the volume was already sufficient and served the correct purpose.
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