Strings are fundamental to the tone and playability of orchestral string instruments, with their origins dating back centuries when gut strings were common. Modern strings are made from synthetic cores, steel, or gut, each offering distinct tonal qualities. Leading manufacturers include Thomastik-Infeld (Dominant and Spirocore), D’Addario (Helicore and Kaplan), Pirastro (Evah Pirazzi and Obligato), and Larsen (Magnacore and Tzigane). Players choose strings based on their responsiveness, warmth, or brilliance, making them crucial for professional performances, student practice, and recording sessions.