 Groups such as the Dixie Hummingbirds, Pilgrim Travelers, Soul Stirrers, Swan Silvertones, Sensational Nightingales and Five Blind Boys of Mississippi introduced even more stylistic freedom to the close harmonies of jubilee style, adding ad libs and using repeated short phrases in the background to maintain a rhythmic base for the innovations of the lead singers.Melodically, gospel songs from this era were more diatonic and conjunct.As "the spirit leads the vocalist" the melodies would become more chromatic and disjunct, evoking pure spiritual emotion that was congruent with the accompanying body or musicians.