Tui St. George Tucker (born Lorraine St. George Tucker; November 25, 1924 – April 21, 2004) was an American modernist composer, conductor, recorder virtuoso and creator of unique musical instruments. Her compositions often feature microtonality and are strongly influenced by jazz, Buddhism, the music of Medieval Europe, and more. She would develop special recorders with extra holes, in addition to unique fingerings for modern recorders to allow for the playing of quarter tones, typically in 24-tone equal temperament.