Khayal ras, a vocal music style with imaginative use of lyrics, began to emerge in instrumental music with Vilayat Khan’s introspective vision and vivid imagination. The tone of sitar was now changed. The right hand remained at its place but there were significant advancements in the left hand. The pancham of kharaj was now replaced with a steel gandhar (this change helps in establishing the mood of the raag). Several other fundamental changes were also made to the structure of sitar.