Pietro Locatelli's Violin Concert in D major, dubbed 'The Harmonic Labyrinth, is one of the most fiendishly difficult pieces of music ever written for the violin.

The original manuscript for the concerto is was inscribed with'Facilis aditus, difficilis exitus', which means 'easy to enter, difficult to exit.'

Recorded during the ACO's 2017 ACO Soloists tour, this 19-minute performance showcases Satu's virtuosity in a fierce test of physical and mental focus.