Most of Chaplin's films were written, directed, acted, produced, and edited, and a large part of the music in them was composed by himself. In addition to writing music, he is also a violinist, pianist and organist. Simply put, all-rounder.
The songs he composed in the 1920s and 1930s sound naturally nostalgic now because they were recorded on LP records.
His music style covers a lot, piano sketches are common, blues, jazz, etc. are also common. The opening theme of The Gold Rush is orchestral.
He has made more than 80 films in his life, most of which were completed within 10 years, making people admirable just thinking about them.