Jon Burlingame editor Faced with the biggest, craziest Keanu Reeves kill-fest yet in “John Wick 4,” composer Tyler Bates upped the musical ante the only way possible: He added an orchestra to the essential “John Wick” palette of raw, headbanging guitars, drums and synths. Bates – also known for his “Guardian of the Galaxy” scores – has collaborated with fellow composer Joel J. Richard on all of the “John Wick” music since the first film opened in 2014. “We share some very similar taste, and as friends, we’re just already on a subconscious wavelength,” says Bates. “If you listen to the four scores, they’ve definitely grown as the scope of the films has. Not in the way that it’s now an orchestra and it’s larger; it’s just that the color palette has continued to develop throughout, still maintaining the fun, hybrid-rock foundation to the score.”