Pohjola was also the arranger of all songs for a vocal ensemble and chamber orchestra. A Classical singer may perform with a single pianist, a small ensemble, or an orchestra. She performed with the college's Jazz Ensemble and Jazz Lab. Session musicians are usually not permanent members of a musical ensemble or band. Orchestral harmonicas are primarily designed for use in ensemble playing. A band is a group of musicians who are organized for ensemble playing. The musicians of the ensemble partially improvise their parts. Mangione served as director of the Eastman jazz ensemble from 1968 to 1972. MacDonald played piano and celeste, with strings by members of the Scottish Ensemble. Hyon was vocalist of the Pochonbo Electronic Ensemble. She now performs with Red Chamber and the Vancouver Chinese Music Ensemble. In 1963, the Berd Dance Ensemble was formed. Dundee is home to a full-time repertory ensemble, which originated in 1939. This technique created a drone effect similar to their experimentation in Young's avant-garde ensemble. He has led bands such as the Hip Ensemble.