MediaMatrix is an online application that allows users to isolate, segment, and annotate digital media. MediaMatrix is an ongoing research project at MATRIX: The Center for Humane Arts, Letters, and Social Sciences Online based at Michigan State University. MATRIX is devoted to the application of new technologies in humanities and social science teaching and research. The Center creates and maintains online resources, provides training in computing and new teaching technologies, and creates forums for the exchange of ideas and expertise in new teaching technologies.