 During this period, each recording usually featured only one lead singer, usually David Ruffin or Eddie Kendricks, although Paul Williams, Melvin Franklin, and Otis Williams each had solo numbers of their own at various times during this period.In 1966, Norman Whitfield changed the group's dynamic, moving them away from the previous one lead singer model and adding elements derived from the rougher soul of artists such as James Brown, Wilson Pickett, and the performers at Stax Records.Whitfield and his lyricists crafted Temptations songs with shifts of dynamics, syncopated horn stabs, and more intricate harmony arrangements which spotlighted each singer's unique vocal range.