From the Wiki:
In the early 1940s many jazz bands began to include ragtime in their repertoire, and as early as 1936 78 rpm records of Joplin’s compositions were produced. Old numbers written for piano were rescored for jazz instruments by jazz musicians, which gave the old style a new sound. The most famous recording of this period is Pee Wee Hunt’s version of Euday L. Bowman’s “Twelfth Street Rag.”
A more significant revival occurred in the 1950s. A wider variety of ragtime styles of the past were made available on records, and new rags were composed, published, and recorded. Much of the ragtime recorded in this period is presented in a light-hearted novelty style, looked to with nostalgia as the product of a supposedly more innocent time. A number of popular recordings featured “prepared pianos,” playing rags on pianos with tacks on the hammers and the instrument deliberately somewhat out of tune, supposedly to simulate the sound of a piano in an old honky tonk.
Three events brought forward a different kind of ragtime revival in the 1970s. First, pianist Joshua Rifkin brought out a compilation of Scott Joplin’s work, Scott Joplin: Piano Rags, on Nonesuch Records, which was nominated for a Grammy in the “Best Classical Performance - Instrumental Soloist(s) without Orchestra” category[9] in 1971. This recording reintroduced Joplin’s music to the public in the manner the composer had intended, not as a nostalgic stereotype but as serious, respectable music. Second, the New York Public Library released a two-volume set of “The Collected Works of Scott Joplin,” which renewed interest in Joplin among musicians and prompted new stagings of Joplin’s opera Treemonisha. Next came the release and Grammy Award for The New England Ragtime Ensemble’s recording of Joplin’s Red Back Book. Finally, with the release of the motion picture The Sting in 1973, which had a Marvin Hamlisch soundtrack of Joplin tunes originally edited by Gunther Schuller, ragtime was brought to a wide audience. Hamlisch’s rendering of Joplin’s 1902 rag “The Entertainer” won an Academy Award, and was an American Top 40 hit in 1974, reaching #3 on 18 May.
Significant ragtime composers of the mid- to late-20th century include Max Morath, William Bolcom, Trebor Tichenor, David Thomas Roberts, and Reginald Robinson.
In 1998, an adaption of E.L. Doctorow’s historic novel, Ragtime was produced on Broadway. With music by Stephen Flaherty and lyrics by Lynn Ahrens, the show featured several rags as well as songs in other musical genres.
In modern times, younger musicians have again begun to find ragtime, and incorporate it into their musical repertoires. Such acts include Jay Chou, The Kitchen Syncopators, Inkwell Rhythm Makers, Curtains for you, The Gallus Brothers and the not-quite as young Baby Gramps or Bob Milne.
