background-music

Draft, generate and lay an instrumental music bed under a finished video's speech - a five-slot brief read off the video, one generation on a music model from the catalog, and the bed mixed with scripts/music_bed.py so it dips under every spoken line and returns between them, with how to move its levels. Use when a final cut gets music under it, when a brief is redrafted for a steer, or when a laid bed sits too loud or too soft.