8809    A MUSICAL VISIT TO SALZBURG  Diane Bish tours Salzburg and presents music from the organ of St. Peter's Monastery with chorale and instruments in the Mirabell Palace.  Diane also visits the Marionette Theatre.  Music heard: Vivaldi "Gloria in Excelsis," Mulet "Thou Art the Rock," Mozart "Alleluia," and Stanley "Trumpet Voluntary."