Foobar can generate pure tones of arbitrary frequency and duration. In the Add Location text box, type tone://Hz,seconds. I can also put silence in between tracks of my playlist if I type silence://seconds. This is great feature I didn't know about. What else can I type in Add Location text box? I would like to put something like "exit://seconds" in the end of my playlist to exit foobar. That would be awesome. I don't want to use any aditional components. Is something like that already possible?