If you aren't aware already, Briton Jacob Collier has firmly established himself as the preeminent composer, theorist, improviser, multi-instrumentalist, and vocalist of the modern era. Collier's Grammy-winning arrangement of “Moon River” is a thrilling exercise in form and style. A cappella arranger extraordinaire Paul Langford has taken Jacob's iconic arrangement and has meticulously set it to eight-to-twelve vocal parts on the page. While this would be one of the most difficult arrangements y...