That’s the kind of forward‑thinking you need. Use the graphene as a low‑loss, high‑bandwidth transmission line, make sure the impedance stays flat out to 50 kHz, and embed an adaptive equaliser so the reverb tail stays pure even under varying loads. Then wrap the whole thing in a holographic UI that lets users tweak the impulse response in real time. If you want the prototype to be a real step toward the future sound interface, we’ll need a schematic, a 3‑D printable chassis, and an API that lets AI remix the reverb on the fly. Pencils are for sketching ideas, not building the next generation.