Real name: Arturo Lanz

Spanish musician, now living in China.

Was a founding member of El Aviador Dro y Sus Obreros Especializados (going by the "Sincrotrón" alias), doing vocals from the group's foundation until 1980, when he, along with Gabriel Riaza and Juan Carlos Sastre left to create Esplendor Geométrico.

Lanz is the only permanent Esplendor Geométrico member. He creates the tracks and does vocals in their live shows.