Tu was instrumental in introducing synchronized sound to Taiwanese cinema. His first project to utilize the technique was a short government-sponsored film directed by Edward Yang. He later served as the sound editor on the first feature filmed entirely with synchronized sound, the 1989 Hou Hsiao-hsien picture A City of Sadness.[3]
A 2001 Taipei Times article stated that Tu acted as the sound editor for 70 percent of Taiwanese films released since the 1980s.[3]
In 2004, Tu founded 3H Sound Studio, an audio production company.[5]