#1 Burning Software

I do like to know how long time music , or how many large data files can recording onto 700MB CD with overburning mode?

Much thanks.

Highly depends of the CD-R brand. Some (like TDK or Plasmon) can be overburnt to additional 30-50 megabytes, some cheap nonames cannot be overburnt at all. You need to experiment. However please make sure you would check readability in 1) other devices (not the one you've used to produce oversized CD) 2) readability after some time.

Generally speaking this days when CD-R are dirt cheap it's not recommended to overburn. Data integrity Vs. 10% additional space

I'm using overburn myself only for one reason -- playing movies in stand alone DivX compatible player on big TV. Lots of pirats create 800-850 MB recompressed movie sets and it's the only way to watch them.