Hans Zim­mer and James New­ton Howard were recently fea­tured on KCRW’s “Morn­ing Becomes Eclec­tic”; on their web­site you can lis­ten to the inter­view and excerpts of the sound­track or read the transcript.

Zim­mer explains that each of the char­ac­ters were so dis­tinct, clearly defined and pow­er­ful that each could have musi­cal iden­ti­ties that were very sep­a­rate. In fact, the col­lab­o­ra­tors often split the work — New­ton tack­led the music for Har­vey Dent, played by Aaron Eck­hart, while Zim­mer cre­ated the Joker’s theme.

“I kept churn­ing around…how do you describe anar­chy, how do you describe a vil­lian and not do it in a way that’s been done before? One of the things I got very much from the char­ac­ter was a fear­less­ness, and an even­ness in a way. The Joker is the only per­son you can trust in the movie. The Joker is the only one who will never lie to you because he is con­sis­tent about his phi­los­o­phy,” said Zimmer.

“I really wanted to do the whole thing just with one note. I had this idea that rather than what a note is in the con­text of the notes sur­round­ing it, what could I do emo­tion­ally through a per­for­mance within one note? How much can I stretch the mean­ing of a sin­gle note and get it down to such min­i­mal­ism. I failed slightly. I had to use two notes in the end.”

Thanks Rachel!