What does the term col legno indicate in string performance?

The term col legno specifically refers to a technique used in string performance where the player strikes the strings with the wooden part of the bow rather than the horsehair. This creates a distinct sound that is often described as being percussive or dry, different from the sound produced by traditional bowing techniques. This technique can add texture and variety to string playing, making it an effective tool for composers looking to create unique timbres in their music.

The other choices refer to different aspects of string performances. A light finger technique does not capture the essence of col legno, as it pertains to bowing dynamics rather than the use of the bow itself. Utilizing harmonics involves lightly touching the strings at specific points, which is unrelated to the bow's material. A fast and soft stroke relates more to the bowing motion and style rather than the specific action of using the bow wood, which is the defining characteristic of col legno.