one thing that's important is that:
i think people are suggesting programs to record audio from one of the sound card LINE IN ports.
but it seems to mean you want to do basically a loop-back type of recording, recording from the sound card's own output.Total Recorder
is the grandfather of all such apps and is a seriously powerful tool; it is shareware but not terribly expensive.
Some soundcards may let you select "what you hear" as the input line, in which case the normal programs above would probably work..
Let us know what you finally go with.