A main feature of our trailer is that the movie is based around events that happened during the evacuation time of the war. As another way to connote the wartime we decided to incorporate the sound of an air raid siren when we see the ghost of Cassandra walking towards the camera. This reminds the audience again about Cassandras past.
First of all we found some tense music on soundbible.com
that sounded like an air siren that would go off in the wartime. We then cut
this track down to the length of the clip that we wanted to add the music to
and pasted this onto a separate track layer.
We then used the dropdown tool to add another track onto
audacity. This track added a deep bass note to the air siren and gave the sound
some more volume and therefore would hopefully cause more of an effect within
the audience.
Finally, to blend the two sounds together we added a small
fade in for the siren noise and we also decided to fade in the beginning of the
track because of how loud this noise was and we didn't want it to sound too
manic because this would add an element of unprofessional-ism which we didn't want.
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