La Bella Vivace Carbon Classic Guitar Strings Hard. Introducing La Bella Vivace Classical Guitar Strings, the first carbon strings worthy of the La Bella name. The first fluorocarbon treble formulation of the 21st Century, offers the brightness of carbon trebles, with an unprecedented beauty of sound. La Bella Vivace trebles add an entirely new warmth and tonal range to first generation carbon. This special formulation provides not only penetrating brilliance and projection, but also an entirely new sensitivity to touch and ease of playing. Dynamically tensioned La Bella Vivace basses are wound to such fine tolerances that individual basses are tuned to perfectly balance the unprecedented brilliance and warmth of La Bella Vivace trebles. Do not leave your playing in the 1900s, play La Bella Vivace 21st Century carbon!