What separates a standard song from a "trailerized" one is the use of specific SFX elements:
Clarity is more important than complexity. Avoid overcrowding the mix so the "big" hits have room to breathe. Trailer Song
Full orchestral power (brass "brams," choir), heavy cinematic percussion (toms, hits), and fast-paced rhythmic driving. What separates a standard song from a "trailerized"
Introduction of "pulses" (constant rhythmic elements), staccato strings, and light percussion. heavy cinematic percussion (toms
Large, bass-heavy sounds (often called "booms") used to punctuate visual cuts or important moments.
Often starts with a "signature" sound, a low drone, or a simple, haunting piano/synth motif.
Creating a "trailer song"—whether you are composing an original piece or "trailerizing" an existing track—is an art form centered on building and maximum sonic impact . 1. The Three-Act Structure