Music has the unrivalled ability to elicit emotions and change human experiences. This study explores the complex interaction between music composition, attendance behaviour, and mood during musical events. Music’s significant effect on human emotions has been the focus of much study and intrigue. Music composers use the emotional power of music to elicit profound reactions from their audiences. In the context of soundtracks, this study explores the complex link between music creators and listeners’ emotions. This study investigates the methods, plans, and underlying psychological processes that composers use to affect the emotional states of their audience by carefully examining previous research and studies on music, emotion, and soundtracks. The study’s methodology is based on an extensive literature assessment, empirical investigations, and theoretical frameworks exploring the mutual relationship between music and emotion. It examines how different musical components, including instrumentation, rhythm, melody, and harmony, can influence listeners’ emotions over time. Furthermore, the study explores how the musical element interacts with contextual factors in cinematic narratives and visual cues to enhance emotional engagement. The study’s findings demonstrate how emotions and music interact with soundtracks. Composers utilize various strategies to alter and shape the listener’s emotions to fit music to the intended emotional arc of the lyrics, pitch, storyline, and melodies. This study synthesizes the plethora of data and ideas from studies on music, emotion, and soundtrack to further the understanding of the complicated relationship between music and emotion. It also highlights the artistic and mental prowess of composers who employ music as a powerful instrument to evoke intense emotional reactions in their listeners. By shedding further light on the impact composers have on the emotional landscape of music and the cinematic experience, this study contributes to the ongoing discussion regarding the art and science of music composition and how it impacts audience emotion.