ScoresFilters. The Carol of the Bells piano sheet music is in the key of G minor (2 flats – B flat and E flat). Easy, Intermediate and Advanced. Composition by Pentatonix. The main melody of the piece is based around anote ostinato pattern that is repeated and then transposed. Carol of the Bells Sheet music for Piano (Solo) Off. BPMF, d. Difficulty level. Sheet music. Sheet music. BeginnerIntermediateAdvancedScore type. Main Info. Free Carol Of The Bells by Pentatonix sheet music Download PDF or