On Seraphim, band's second CD, the musicians of Irfan use traditional (Bulgarian, Balkan, Oriental, Persian, Indian) and medieval European instruments and vocal techniques from the same regions and historical periods, skilfully woven into a delicate electronic sound. Irfan is also known for its extensive use of a choir of strong male vocals in addition to the ethereal and mystic female vocals in combination with an assortment of traditional and medieval string, wind and percussive instruments including the oud, saz, santoor, viola da gamba, tambura, duduk, darbouka, daf, bendir, zarb and riq.