The fruit of a long friendship, always linked to the world of the guitar, Víctor Estrada and Fran Gamallo decided in 2008 to present a new type of instrumental combination in public: the duo for theremin and guitar. Both instruments complement each other thanks to the contrasting characteristics of their timbres, envelopes and type of articulation. The theremin is the first electronic instrument in history that has survived to this day, it was invented in 1919 by the great Russian scientist Lev Sergeyevich Termen.