The conventional CD-R has got only a maximum capacity of 700 MB / 80 min. So we could write only data cd's having size < 700 MB. But we could burn audio or video upto 80 min. Usually a 80 min audio file has a size > 750 MB. How is this possible to write such a large file. What mechanism is used or what is difference in writing a data cd and an audio cd. please give ur suggestions.