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" option(see picture).

3. Left click on disabled device that you want to use, then right click to open popup menu and checked "Enable" option;

4. Now, you can record sound from any source in vista.