For his graduation project from the jazz department at KMH, Icelandic trumpeter and composer, Tumi Torfason, put on a big band concert with an original program of music and an alternative instrumentation. In this thesis he describes his research and creative process leading up to the concert with insights into his inspirations, compositional methods and approach to arranging. He explores the relationship between compositions and the instruments they are composed with and composed for. In addition, the thesis explores how those findings can then be applied to both the composing and arranging of this new program of music. He also goes into how the artistic side relates to the logistics behind the concert and finally discusses his findings and arrives at some interesting conclusions.