Listen to An Idea (Passacaglia for Eli) online. An Idea (Passacaglia for Eli) is an English language song and is sung by Rovshan Mamedkuliev. An Idea (Passacaglia for Eli), from the album Rovshan Mamedkuliev Guitar Recital, was released in the year 2013. The duration of the song is 3:10. Download English songs online from JioSaavn.