Tuvan khoomei is a biphonic throat-song of the Central Asian steppe: a low fundamental drone carries a focused 1–2 kHz overtone formant that whistles above it. Imaged as a scientific spectrogram, that overtone stacks into a ridge of harmonic bands — cool grey on a dark field, amplitude read as grey value. This system renders that acoustic portrait as a design language: slate ground, greyscale harmonic ridgelines, cyan-teal steppe-sky and a single ochre of sunlit grassland. Time scrolls left-to-right; loudness darkens; the horsehead and the mountain silhouette hover at the horizon.