[1] Szántó contributed substantially to the rewriting of the piano part of the third and final version of Frederick Delius’s Piano Concerto in C minor, and he introduced this version at a Prom Concert in London on 22 October 1907 under Henry Wood.
[9] Theodor Szántó was an early champion of the music of Zoltán Kodály and Béla Bartók.
[10] It was his playing of Bartók's Romanian Dance in 1914 that introduced Arthur Hartmann to the music of that composer.
[1][10] He also made some piano transcriptions of works by Johann Sebastian Bach and Igor Stravinsky, which reveal a virtuoso technique.
His complete piano works [12][13] are recorded by the composer and virtuoso pianist Artur Cimirro for the CD label Acte Préalable Szanto was considered an important piano teacher.