You do need vibrato to emphasise phrasing and emotion, but not as an automatic part of your sound'

Cellist Steven Isserlis puts former BBC Young Musician of the Year winner Guy Johnston through his paces in Rachmaninov's Cello Sonata at the International Musicians' Seminar Prussia Cove, and talks about the correct use of vibrato.

The Strad's September issue, out now, celebrates the great teachers who have influenced some of today's top players. Subscribe to The Strad or download our digital edition as part of a 30-day free trial. To purchase single issues click here.