The range of sound typically perceived within the audible frequency spectrum is limited—we refer to this range as the “audible-visible” spectrum. Our works expand beyond this, employing both sub-bass and high-frequency sounds that lie at the edge of or beyond perception. Through these, we create rich sonic experiences grounded in unfamiliar textures. Rather than relying on rhetorical devices, our music engages as a physical phenomenon that resonates with space and invites responsive listening. In +3x10^8m/s, beyond the light velocity, we were noted for achieving an extreme level of expressive power through precisely crafted sound. (국문)