Sound Force is an independent music-based tactical unit, and played a vital role in the latter half of Macross 7. The unit was first proposed by Dr. Chiba, to combat the growing threat of Protodeviln on the civilian populace on City 7. Members of the rock group, Fire Bomber were subsequently recruited. At first, they had trouble recruiting Mylene Flare Jenius, but once it was clear that the Sound Force had nothing to do with the military, she joined.
Each member of the Sound Force received a customized variable fighter, outfitted with advanced sound broadcasting equipment.