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His touchstone for a fantastical creature that successfully achieved believability was the Hippogriff, a winged four-legged creature seen in 2004’s “Harry Potter and the Prisoner of Azkaban.”

That is the subtitle of “Keyframes for a Hippogriff,” the sprawling, chaotic explosion of postmodernism that the New York Philharmonic played on Saturday evening at David Geffen Hall, conducted by Thomas Sondergard.

“Hippogriff” was to have had its world premiere with the Philharmonic as part of its Project 19 series of new works by female composers.

Thirty minutes long, and scored for a big orchestra, countertenor soloist, children’s choir, broad battery of percussion, electric guitar and pair of synthesizers, “Hippogriff” is not so easily dismissed.

A trailer released for the game, which explores a new wizarding-world story set in the 1800s, shows players brewing potions, casting spells, roaming the castle halls and flying around the school’s scenic grounds on the back of a Hippogriff.