Guest conductor Randall Perry (top) of Jim Thorpe, and Palmerton Area High School music teacher Joseph Plechavy (on piano), rehearse with members of the Carbon County Chorus inside the Palmerton Area High School auditorium Thursday morning. The group, which consists of students from Palmerton, Lehighton, Weatherly, and Pleasant Valley high schools, will perform a concert tonight at 7:30 p.m. inside the PAHS auditorium.