The repertoire of melody patterns in traditional Persian art music is organized into systems or modes. The seven main systems are called dastagh, and the five secondary systems are avaz. Classical Music of Iran, Vol. 1: The Dastgah Systems presents examples of both. The music usually consists of a solo instrument or instrument plus voice, often singing verses from mystic Persian poets. Musicians improvise off a traditional melody and use a number of instruments, such as the tar (6-string lute), santour (hammered dulcimer), and kamancheh (stringed instrument similar to violin). Liner notes include an analysis of Persian music and track notes. Parts of this album, along with Classical Music of Iran, Vol. 2: The Dastgah Systems were reissued in 1991 as SFW40039.