In a paper recently published in Nature Communications, researchers from the Paul-Drude-Institut in Berlin, and the Instituto Balseiro in Argentina, demonstrated that the mixing of confined quantum fluids of light and GHz sound leads to the emergence of an elusive quasi-particle: the phonoriton. This discovery opens a novel way to coherently convert information between optical and microwave domains, bringing potential benefits to photonics, optomechanics, and optical communication technologies.