Embedded Player Four of the great masters of Persian music are touring the United States. Among them will be Iran's legendary vocalist Mohammed Reza Shajarian, tar (lute) player Hossein Alizadeh and kamancheh (spike fiddle) player Kayhan Kalhor. Host Jacki Lyden talks with Kayhan Kalhor about the evolution of Persian classical music and about the poetry. The four have a CD as well, from a recent tour. It is called Without You, by the Masters of Persian Music on the World Village label. (8:00)