Sisters Amelia and Dominique Granturco will deliver a weighty duet at an event to celebrate 125 years of education at their former high school.
The Our Lady of Mercy College Parramatta graduates will play Piazzolla’s Libertango on the accordion at the school’s anniversary concert at Parramatta’s Riverside Theatres on Thursday.
Dominique said they began playing the instrument after Amelia saw a man busking on the street when she was 5.
Her accordion weighs more than 18 kilograms and Amelia’s about 24 kilograms, both with 120 buttons on the left hand and three octaves on the right to master.
‘‘It’s such a versatile instrument,’’ Dominique said.
‘‘You can play a variety of genres with it, not just folk music. You can play pop, traditional, jazz, tango.’’
Dominique said the Riverside audience would be larger than at the weddings and birthday parties she and her sister normally play at.
Both have pursued music since graduating high school —Dominique as an audio engineer, and Amelia as a classical performer and music teacher.
‘‘It’s really nice to be part of something this big,’’ she said.
‘‘The orchestra is sounding really good and they’ve got more than 100 people in the choir, so it’s going to be spectacular.’’
Creative arts foundation Ars Musica Australis has commissioned two new pieces of music on behalf of the college for the event.
A Vision of Mercy was written by Daniel McCallum, who has composed for films including The Hobbit and Hyde Park on Hudson.
A cappella choral work Sweet Mercy was composed by Matthew Orlovich based on words attributed to Sisters of Mercy founder Catherine McAuley. His previous works have been performed by the Sydney Symphony Orchestra, the Choir of London and others.
A CD of music performed at the concerts may be purchased on the evening or through the College website.
■The anniversary concerts are on June 5 and 6 at Riverside Theatres, corner of Market and Church Streets, Parramatta. Tickets: riversideparramatta.com.au.