More complex forms found in Classical music
Sonata Allegro form – https://oyc.yale.edu/music/musi-112/lecture-9
Rondo Form — Minuet and Trio – https://www.youtube.com/watch?v=RZtcI-7GPMg
Theme and Variation Form – https://www.youtube.com/watch?v=raqOYw5kRdc
Symphony – https://www.youtube.com/watch?v=84TZK1AvMlA
Ritornello Form – https://www.youtube.com/watch?v=BvMTCRofeB4