Plainsongs for Peace and Light for unaccompanied mixed voices sees Harvey re-examining the very fundamentals of his craft - superimposing lines of plainsong, relishing the simple clash of note against note and creating rich, otherworldly sonorities through an elaborate use of canon. Harvey was a composer who always embraced and sought-out the very latest in musical technologies but the simplicity of the a cappella choir became something of a constant to which he returned throughout his life.