Alessandro Rolla (22 April 1757 – 15 September 1841) was an Italian viola and violin virtuoso, composer, conductor and teacher. His son, Antonio Rolla, was also a violin virtuoso and composer.
His fame now rests mainly as "teacher of the great Paganini", yet his role was very important in the development of violin and viola technique. Some of the technical innovations that Paganini later used largely, such as left-hand pizzicato, chromatic ascending and descending scales, the use of very high positions on violin and viola, octave passages, were first introduced by Rolla.
Because of the technical innovations introduced, his work might be considered helpful for the development of viola technique. His style varies from the very melodic phrases, typically operatic in character, rich in fiorituras, to the extremely virtuoso writing, the style we are used to identify with Paganini. Ingredients of this technique are an ample use of double stops, fast passages in thirds and sixths, octaves from the first to the eighth position, very fast ascending and descending diatonic and chromatic scales, flying staccato, left-hand pizzicato. This intense virtuosity was a new innovation for viola technique, practically unheard of in previous times. Bertini, a historian of his time, in a dictionary of musicians reported that Rolla was prohibited to play in public because women could not hear him without fainting of being struck by attacks of nerves. (Hide extended text)...(Read all) Source : Wikipedia