Creating a string arrangement is the most powerful way to make a piece of music soar. Whether adding an epic string part to your latest pop song or composing for a classical quartet, there’s so much you can do with these dynamic instruments. The bariolage part isn’t only exciting because of the chromaticism — all those repeated A’s are intense too, in a way that doesn’t come across fully in MIDI form or played on a piano. On violin, you’re not just hammering the same note over and over. You’re really playing two different notes that are both very close to being A — you alternate between the open A string and the D fingered at the equivalent of the seventh fret in the guitar. These two A’s are a little out of alignment with each other.