Grammy Award-winning guitarist Jeff Peterson has two unique concerts coming up. One--later this month--traces the orgins of the guitar from its roots in the Arab world to today's Hawaiian slack key. And the other--on Sunday--reunites Peterson with shakuhachi Grandmaster Riley Lee. Peterson recently brought his slack key guitar to our studios where HPR's Derrick Malama asked him about the first concert with Lee. For tickets to the Jeff Peterson/Riley Lee concert this Sunday at the Doris Duke Theatre, call 532-8700. The concert at Shangri La is sold out.