Thirty-six keys from G2 to F♯5, centered on middle C. The primary octave runs G3 to F♯4 — the twelve colors of the Cathartes Scale at full strength, red at G3 through yellow-green at middle C to magenta at F♯4. Below it the colors darken toward Yin; above it they lighten toward Yang. Tap any key.
◖ Yin
left · lower notes · darker shades · below the primary octave
G3 – F♯4 · Primary
the twelve colors at full strength · middle C centered
Yang ◗
right · higher notes · lighter shades · above the primary octave
Tap any key to see its note, its color, and its place in the Cathartes Scale — the sphere or path it carries, its virtue, and whether it sits in the primary octave or in the darker register below or the lighter register above.