If you use window VISTA system, the default status of some
recording source(like "stereo mixer") is disabled,
so you can't found your need recording source in source list
on super sound recorder pro. you should step by step to enable
these recording source:
1. Right click on speaker icon in right-bottom system toolbar(see
picture) to open sound manager dialog;
2.Right click on the blank space of record source list to
open popup menu, then select "Show Disable Device"
3. Left click on disabled device that you want to use, then
right click to open popup menu and checked "Enable"
4. Now, you can record sound from any source in vista.