Brian Mueller initially wrote Danny Boy while he was a doctoral student at Indiana University. Brian finally arrived at this current version after a brief period of study with famed marimba virtuoso ?ric Sammut in Paris. It was Sammut who recommended that a variation of the piece be incorporated where the performer can improvise over the main structure. Included in this score is exactly that, a variation structure with chord symbols and a bass line specifically for the performer to improvise if they wish. For those less inclined to improvisation, a fully-notated version of the variation as performed by Mueller is also included. Because of Sammut?s indelible influence on him, Brian decided to dedicate Danny Boy to him. This piece ships in a printed, professionally bound folio with a full color cover.