One heart is an upcoming documentary picture describing about true internal feelings of the band people (singers,musicians and so on) used in his concerts ,efforts made in organizing it, and most importantly the endless joy resting in this work. Recently the trailer of this film released featuring A.r.rahman, jonita Gandhi, haricharan & some others with two of the bgm's in his composition's from roja and sounding millionaire. And in this trailer A.r.rahman quoting "it's all about the music, my band, and my journey "....