Project 19 is an initiative launched by the New York Philharmonic in 2020 to commission works by female composers. The latest creation in that series is Olga Neuwirth’s Keyframes for a Hippogriff — Musical Calligrams, which will receive its U.S. premiere on April 18-20. Neuwirth’s work uses texts by Ariosto, Emily Dickinson, Walt Whitman, Friedrich Nietzsche, graffiti artists, and others, including the composer herself. Countertenor Andrew Watts and the Brooklyn Youth Chorus will lend their talents. The program, conducted by Thomas Søndergård, also includes Lily Boulanger’s D’un matin de printemps and Prokofiev’s Fifth Symphony.