The Thomastik-Infeld RONDO® D-string NO.RO42 is a present-sounding string with an open, clear and radiant tone color. Despite this clarity, it has a profound keynote. The string’s register is baritone, yet still brighter than other D-strings in this spectrum. A special feature of the NO.RO42: Usually the G-string on the cello is the supporting string for the entire set. But the NO.RO42 assumes this function as a D-string. Unlike conventional D-strings, it does not take any tonal energy from its neighboring strings. It actually supports them. The A-string, in particular, becomes more open and full-bodied. In addition, NO.RO42 reacts smoothly and with reliable resistance to changes in playing.