Recuerdos de la Alhambra (translation: Memories of the Alhambra) is a classical guitar piece composed in 1896 by Spanish composer and guitarist Francisco Tárrega. He wrote it in Granada.
The piece showcases the challenging guitar technique known as 'tremolo,' where a single melody note is plucked repeatedly by the ring, middle and index fingers in such rapid succession that the result is an illusion of one long sustained tone. The thumb plays a counter-melody on the bass between melodic attacks. Many who hear this piece initially in a non-live setting can mistake it for a duet rather than a challenging solo effort.
Performed by Christopher Parkening from his album Recuerdos de la Alhambra.