MIGHTY FORTRESS – Inspired by Heartsong arranged for full orchestra accompaniment.  A lead sheet supplied for all rhythm players.  The full orchestra accompaniment includes full strings 2111, woodwinds 21211, brass 2331, percussion (tympani, bells/chimes, shaker, cymbals).  Sub alternate parts include alto sax, tenor sax, baritone sax, euphonium (C bass), baritone (Bb treble) and a full score.  See the sample score for more detail on the orchestration.  This fits with the original recording and is in the same key of B.  NOTE the original only uses a rhythm section.