Technical Requirements of Audio HelpSome of the help pages have links to audio help files. The audio help files are web pages with embedded .au sound files. The sound files include a teacher discussing the question. These sound files typically play on both Windows and Macintosh platforms. In some cases, a browser will have to be configured to play the sound file. QuickTime is the best player of these .au sound files. If the sound files do not play automatically, then you may have to configure your browser to play QuickTime movies. Different computers and different browsers do this in different ways. The best means of configuring your computer to play the sound files is to ask a mildly-savvy classmate to make a house call and do it for you.