Education is a potentially important application area for intelligent multimedia knowledge management. One source of knowledge is archived recordings of audio presentations including lectures and seminars. Recordings of presentations often contain multiple information streams involving visual and audio data. If the full benefit of these recordings is to be realised these multiple media streams must be properly integrated to enable rapid navigation. This paper describes an approach to the integration of the audio soundtrack with electronic slides from a presentation by automatically synchronizing them. A novel component of the system is the detection of sections of the presentation unsupported by prepared slides, such as discussion and question answering, and automatic development of keypoint slides for these elements of the presentation.