Song ad (AI music ads)

A song ad is a short animated story told in pictures while a song tells it in words. The song is the spine: it sets the pacing, the emotion and the length. The pictures are a real story (a setup, a turn, a payoff), shot like a film: every shot moves, there is depth in every frame, the emotions are big and readable with the sound off, and the cutting follows the music.

Nobody sings on screen. The song plays over the pictures like a music video; characters act, react and move, with their mouths closed. (Lip-sync is not reliable enough in the video model for production ads, so this skill never asks for it.)

Pipeline: brand + research → lyrics → song (vocals from second 0) → transcript and timing → Look + character + product sheets → timed shot list → one Seedance 2.5 clip per block, each with its own slice of the song → motion check on every block → stitch with the full original song on top, captions, product hero.

How this runs on the Arcads MCP

Generation runs on the Arcads MCP connector; cutting audio, trimming and stitching run locally with ffmpeg (the MCP has no audio-cut tool and cannot lay an audio track under a video). Keep everything for one ad in a local run folder, <run> (for example ./song-ad-<brand>-<date>/).