Composer Henry Jackman is on the short list of seasoned composers who can concoct and deliver an elevated musical palette. Whether the story is about mutant, vigilantes, pirates or the mighty Kong, his work serves as more than the backdrop to the narrative. It is the jet fuel that courses through the picture and literally makes characters fly. We’ve spoken to him a handful of times over the years and his approach to composition and the ideas he manifests live on long after you’ve left the theater. To help make his latest cinematic confection oh so sweet, he enlisted an equally talented and courageous musician to try things that, as…