Tchaikovsky's Six Pieces, Opus 21, in similar fashion to his Opus 19, is a volatile set of pieces that may not necessarily give you the sound you expect based on the title. Nowhere is that more exemplified than in the freeform Marche Funebre, which abandons the steady, morose pace of most funeral marches in favor of more freeform tempos. Check out the final piece for exciting melodies typical of a vivacious closing piece.