Conversation so far:
What music did Scott Joplin rejuvinate?
Scott Joplin and his fellow ragtime composers rejuvenated American popular music, fostering an appreciation for African-American music among European-Americans by creating exhilarating and liberating dance tunes.
How much money did Scott Joplin die with?
Scott Joplin was penniless and disappointed at the end of his life
What was ragtime music?
Ragtime is a musical style that enjoyed its peak popularity between 1895 and 1919. Its cardinal trait is its syncopated or ragged rhythm

Question: What did Max Morath say about his music?
Self-contained rewrite: What did Max Morath say about Scott Joplin's music?