The Educational Audio & Video Library | Open Culture
Collection of audio and video for education. Includes audio books, podcasts, music, selected YouTube videos, and university content
Results of an experiment on the encoding bitrate for Captivate. Mark Siegriest is trying to find the best audio settings to balance sound quality and file size.
The most surprising finding in this is that at the lowest bitrates, the file size actually went up, not down. 32kbps was the smallest file size in his sampling.