Image source, Andrea Pavlou Image caption,

TwoSet perform in London in a sell-out, one night only concert

By Iona Hampson

BBC World Service

Brett Yang and Eddy Chen met at after-school maths tutoring when they were growing up in Australia - now they are selling out international concert venues on their second world tour.

TwoSet Violin, as they are called, is one of the biggest classical music acts online.

With over 7.5 million followers across social media platforms and more than 1.3 billion views on their YouTube channel, the Brisbane duo have shown how the classical music community can bring in new audiences with a little bit of practice and imagination.

The pair, now in their early 30s, are known for their entertaining and informative videos which they started posting on YouTube in 2013.

Their content ranges from mocking inaccurate depictions of violinists in films including 2016's High Strung, to encouraging the biggest classical acts, such as violinist Hilary Hahn, to take part in challenges like playing Mozart while hula hooping.

They even dared to parody South Korean girl group Blackpink for using a small part of a motif from Paganini's La Campanella étude in their song Shut Down. Eddy Chen impersonated the Italian violinist and composer in a video and imagined how he might have critiqued the track.