From publisher blurb:
Two of Otherverse Game’s signature settings encompass music in a big way, and the rest can be as rocking as the game master wants.
Heavy Future’s all about the power of rock n’ roll, and tearing up the 46th Century in a airbrushed space cruiser blasting heavy metal. Black Tokyo encompasses everything anime, so idol singers and magical girls with a gift for song and dance and military-grade moe are perfectly valid character options. And hey, if you want to have an activist post-human weaponize protest rock at a clinic defense rally in the Otherverse America campaign setting, go for it. And over in the Psi-Watch campaign setting, metal head superheroes might balance concert tour dates with black ops.
With all that in mind, sometimes music itself can be a weapon. This short sourcebook introduces Musical and Superior Musical Weapons- high tech or technomagical sound-based weapons that are especially deadly in the hands of a skilled performer. This sourcebook primarily focuses on Musical Weapons and related content for the Heavy Future campaign setting, but there’s plenty usable in this sourcebook for Black Tokyo, not to mention of plenty of content usable in either world.