👉 In the context of music, a "psalterer" is a person who plays or writes music. They are often associated with the Protestant Reformation, which led to the development of the Counter-Reformation, where the emphasis shifted away from the traditional church music and towards secular music. The term was used by composers like Johann Sebastian Bach, Wolfgang Amadeus Mozart, and Ludwig van Beethoven, who were known for their musical innovations and contributions to the Protestant Reformation.