Soundwave is a fictional robot character appearing in various Transformers continuity lines within the Transformers franchise. His most well-known disguise is that of a micro cassette recorder. Throughout most of his incarnations, he is an underlying loyal lieutenant of the Decepticon leader Megatron. He is commonly depicted as Megatron's communications officer and in some interpretations, only speaks when mocking the Autobots.

Transformers is a media franchise produced by American toy company Hasbro and Japanese toy company Takara Tomy. It primarily follows the heroic Autobots and the villainous Decepticons, two alien robot factions at war that can transform into other forms, such as vehicles and animals. The franchise encompasses toys, animation, comic books, video games and films. As of 2011, it generated more than ¥2 trillion in revenue, making it one of the highest-grossing media franchises of all time.