There's a well-known and annoying design feature of new Lenovo laptops (e.g. the X61s) -- they lack the "stereo mix" feature that normally allows you to record what is played back. See for example this discussion:
It's possible to get around the problem in software using "Virtual Audio Cable"
but this system is rather complicated to use.
When I try SoundTap, it looks to me as if it fails to solve this problem. If I'm wrong, I'd love to buy a copy, and I expect that lots of other Lenovo users would as well.