It's a commission, which leaves me no choice. It's Ideal as a Soprano solo and much less ideal for Horn. The original was fine on horn, but with Eva Cassidy's version, it's in an odd(ish) key and the guitar is Capo'd to make it even worse. The horns and baritones team up to provide the arpeggio comp, which cannot be written as it sound in the recording as a ny composer and arranger will testify, arranging music that is written for guitar is exactly that of the piano, it simply cannot be transcribed as is, it would sound drastic as hell.
But, to make all cinfucions clear, this is a commission and I cannot change that, but it really does sound lovely on the Cornet!