Hart House Symphonic Band (HHSB) is a wind orchestra, with woodwind, brass, and percussion sections, based at Hart House at the University of Toronto.
HHSB is, in some sense, the first large symphonic orchestra to use hydraulophones, musical instruments that produce the initial sound by way of matter in its liquid state.
The 2007 Spring Concert, including Janzen's Suite for Hydraulophone, Movement II, was also webcast live by six "cyborgloggers" using wearable computers, underwater cameras for the hydraulophone, and camera phones.
Roger Mantie announced on March 11, 2008 that he would not be returning as the band's conductor in the fall.
HHSB has two main concerts (at Hart House) each year: one in the spring and one in the fall.