The Perks of Being a Wallflower soundtrack research

There are various types  of ambient back ground music in this trailer which I found effective.It initially introduces the beginning scene with up beat guitar strings, there is also non diegetic sound of a narrator voice over of the protagonist overlapping the music.This is an editing technique we are looking to include as well.There is also a pause in the music where the protagonist says an important phrase " I really want to turn things around this year" at 0.18. This has been done so that the audience can focus on this phrase and it suggests to the audience that this year is going to be an important one in the protagonists life foreshadowing the plot in the film.The music then pick ups again after this phrase and there is another instrument included in this melody that seems to be a type of maracas. This creates an upbeat pace for the trailer.There is a sound of clapping that is used to transition to another sound of a piano  with a higher pitched set of maracas. That are quicker and include occasional claps this conveys positive and motivating emotions.The music it's time by imagine dragons is then played at 1:30 which is a well known song from a successful band that creates excitement for the target audience as it will be a song that the target audience will be familiar with. the rating 13 and over. Even though I'd love to include a well known song we have to avoid it due to low budget it has to be non copyright sounds and original music. I just find the variation of three different songs to be effective in keeping the trailer interesting.