xynthia is an audio brand I am building end to end, as a place to push my design: the identity first, then a first software instrument, then a physical one, modelled in Blender, printed and wired by hand. It has one idea, sound you can see. Every instrument has a field that draws what the sound is doing, and every control moves that drawing.
The identity is a fork of the xoboid system: ink and paper, every grey diluted from one ink, Geist to write and M PLUS 1 Code to report. Inside it sits Kentaro's instrument grammar: a quiet frame around a living field, a value that wears the mark it moves, brackets on whatever the hand is on. One red, taken from a recorder, is spent only on what is live.
The first instrument is freqr, a desktop parametric equaliser in Tauri, Svelte and Rust. On the site it appears as fq-01: freqr drawn as a desk equaliser with an isometric anatomy kit, forty solids in four-tone shading and painter's order, every part real. The reel turns frequency, the faders set gain, the knurled knobs set width, the pill bypasses, A and B recall snapshots, and the display scans the spectrum through the curve, all from one small model.
Around it is the brand's system: a review sheet where every open decision is a live control and the review exports as Markdown, a design guide that runs from identity to product, and a roadmap from the first instrument to the first object.
