A.T.C on Instagram: "At first glance it looks like construction material, until the sound makes you stop and question everything you’re hearing. A single double bass string is stretched inside a standard drainage pipe, bowed like an upright bass, and routed through a guitar amplifier. There are no digital effects, no software layers, and no post-processing tricks involved. The pipe itself becomes the resonant body, shaping low frequencies in a way traditional wooden instruments cannot. Its lengt