The West Australian Symphony Orchestra (WASO) is an Australian symphony orchestra based in Perth, Western Australia. Its principal concert venue is the Perth Concert Hall. WASO also gives concerts in Mandurah at the Mandurah Performing Arts Centre. As of March 2012, WASO has a roster of 79 full-time musicians. The orchestra has an affiliated WASO Chorus. WASO currently presents over 170 performances per annum throughout the state.