Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the string suitably. By doing so, he/she is adjusting

Explanation

Before an orchestra performance, a sitar player tries to adjust the string tension and tune the string properly. By doing so, he adjusts the frequency of the sitar string with the frequency of other musical instruments. Note that equalization is a process used to balance the frequency components within an electronic signal so that it matches the frequency components of other instruments.