definitions for each

chamber music
First Viennese School
singspiel

Chamber music: a type of classical music composed for a small group of instruments, typically one player per part, and intended for performance in a small, intimate setting such as a chamber or salon.

First Viennese School: a term used to refer to a group of classical composers who were active in Vienna, Austria during the late 18th and early 19th centuries. The composers associated with the First Viennese School include Joseph Haydn, Wolfgang Amadeus Mozart, and Ludwig van Beethoven. They played a significant role in shaping the Classical period of music.

Singspiel: a form of German-language opera that combines spoken dialogue with musical numbers. Singspiel was popular in the 18th century and typically featured comedic or light-hearted plots. This genre is characterized by its use of dialogue interspersed with musical sections, often including songs, arias, and ensemble numbers.