We know he could do it. The great physicist gave a famous recital of the Mozart sonatas in 1911 at Charles University in Prague, with the writer Max Brod at the piano. Einstein was a passionate and accomplished violinist who would take out his instrument at almost any excuse.
But is this newly ‘rediscovered’ recording really him? We have no proof. Some allege it is Carl Flesch. But who is the pianist? All enlightenment gratefully received.