From 1913 to 1915 Jemnitz lived in Berlin and studied composition with Arnold Schoenberg and began writing articles on music, several of which were published in Die Musik in 1914 and 1915.
[1] Jemnitz taught at the Béla Bartók Conservatory of Music in Budapest from 1951.
During his last years, he published several popular books on composers including Felix Mendelssohn, Frédéric Chopin and Wolfgang Amadeus Mozart.
Jemnitz's musical style is heavily influenced by Reger and Schoenberg.
[2] His compositions include works for orchestra and keyboard, as well as vocal, choral and chamber music.