A musician who plays timpani is a "timpanist". For this movement Walton specifies a second timpanist and two other percussionists. Firth was the principal timpanist of the Boston Symphony Orchestra from 1956 to 2002. In 1982, Seegers joined the Berlin Philharmonic orchestra and now is their principal timpanist. Upon graduation, he served as timpanist with the 7th U.S. Army Symphony Orchestra. His teacher was a former timpanist with the Philadelphia Orchestra, Fred Hinger. Bonebrake has also performed as timpanist with the Palisades Symphony. In that episode, she was also the timpanist for the school's orchestra. While studying at Indiana University from 1972 to 1976 Aronoff studied under timpanist George Gaber. In the end, it often comes down to the discretion of the timpanist. The original gatefold album sleeve includes a photograph of timpanist John Keel in ceremonial dress. For general playing, a timpanist will beat the head approximately in from the edge.