Mentioned only in passing by Audsley, who says: [Clarin] is labeled in Spanish organs with several qualifications as follows: Clarin Real, Clarin de Batalla, Clarin Claro, Clarin Sordino, Clarin Pardo, Clarin de Bajos, and Clarin de Ecos. Claro means �clear, bright or fine�.
Clarin Claro 4', Lower Manual; Toledo Cathedral, Toledo, Spain; Juan Gaytan of Toledo 1549.