Michael Tilson Thomas
The B-Sides is a symphony in five movements for electronica and orchestra by the American composer Mason Bates. The work was commissioned by the San Francisco Symphony and conductor Michael Tilson Thomas (to whom the piece is dedicated), with support from the Ralph I. Dorfman Commissioning Fund. It was premiered May 20, 2009 at the Louise M. Davies Symphony Hall in San Francisco, with Michael Tilson Thomas leading the San Francisco Symphony.