Non-program music is also known as absolute music.
Contrary to program music, absolute music is non-representational and is frequently referred to as abstract music. It is music that is not explicitly "about" anything. The concept of absolute music emerged in the writings of early German Romanticists like Wilhelm Heinrich Wackenroder, Ludwig Tieck, and E. T. A. Hoffmann at the end of the 18th century, but the term wasn't coined until 1846, when Richard Wagner used it for the first time in a program to Beethoven's Ninth Symphony.
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