Reinhard Peters, Philharmonia Hungarica & Ruggiero Ricci - Violin Concerto in E Minor, Op. 64: II. Andante

Ruggiero Ricci citáty

Of course the most difficult thing on the violin is always intonation. The second one is rhythm. If you play in tune, in time with a good sound that's already high level. Those three are the main things.