Where it works
Cheerful music lifts product videos, kids’ content and vlogs, but it can feel forced under serious subjects.
Building it in practice
Happiness in music is fragile: too fast and it turns frantic, too sweet and it sounds like a toy advert. A reliable recipe is a major key, a tempo between 112 and 124 BPM, one acoustic lead such as ukulele or whistle, and claps on the backbeat. If the result feels childish, swap the glockenspiel for electric piano and add a bassline that moves; if it feels flat, ask for a key change into the final chorus.
Prompts to try
Happy upbeat track at 120 BPM, ukulele, handclaps, whistled melody, bright and bouncy
Joyful pop instrumental with brass stabs, major-key piano and a feel-good chorus
Cheerful acoustic folk with banjo, glockenspiel and stomps