A lover of speed, cars and aeroplanes, the American composer settled in the Paris of the Années Folles, where he frequented Picasso and Stravinsky, and composed works such as Sonate sauvage and Jazz Sonata, which caused a scandal: during a concert in Budapest, he even brandished a Chicago gangster-style pistol to restore silence in the hall . . . He hero-worshipped Beethoven, whose pieces he played in the first part of his recitals before moving onto his own music. In 1933, he returned to the United States where he met John Cage and Morton Feldman.

PatKop and the young Finnish pianist Joonas Ahonen – whom The Times, following what the journalist described as ‘one of those concerts you remember for ever’, presented as the violinist’s ‘doppelgänger’! – pay tribute to the ‘Bad Boy of Music’.