Significant Rests determine Wedding or Funeral. Does a composer write rests into his music or not? If he does, the rests have a very specific function. They add lightness or breathing space into the music. We would expect a lack of rests in a funeral march due to its somber nature. On the other hand, we would expect rests in a Bridal Chorus. On the basic level: A funeral is a sad and heavy occasion = few, if any rests. A wedding is lighter and definitely joyful. We would expect quite a number of rests. Significant rests, and other factors determine the difference. One of the most tradition funeral marches was written by Chopin. While, the most traditional wedding march for the processional was written by Wagner.
Frédéric Chopin‘s Piano Sonata No. 2 in B♭ minor, Op. 35, popularly known as the Funeral March, was completed in 1839 at Nohant, near Châteauroux in France. However, the third movement, whence comes the sonata’s common nickname, had been composed as early as 1837. It was played at the graveside during Chopin’s own burial at Père Lachaise Cemetery in Paris.