Ballad operas originated in England in the early 18th century and were typically satirical in nature, often poking fun at political figures or social conventions. They were typically performed in public theatres and featured popular actors and singers. Ballad operas often used traditional folk melodies and dance tunes, and the music was often simple and lively.
Singspiels originated in Germany in the late 18th century and were typically more sentimental or romantic in nature. They were often performed in court theatres or private salons, and often featured elaborate sets and costumes. Singspiels often used more complex classical music, and the singing was often more operatic in style.
Both ballad operas and singspiels played an important role in the development of opera and musical theatre, and they helped to popularize the use of music in dramatic works.