If your speakers are connected via the line out on the soundcard, then the audio must be being captured from line in unless you have hardware monitoring features (often called 'zero latency monitoring'). If that's not the case (ie you are not routing the speakers through the soundcard) and assuming your soundcard is fully supported by the installed driver and is set up correctly, it sounds to me like you haven't got your mixer set to the right channel for recording from line in. If you have ALSA drivers installed, try running alsamixer and see which channel is set for 'capture'. If you have OSS drivers, try aumix or kmix. If that fails then I would go back and check that your soundcard is fully supported by the driver, then try some setup tests. Cheers Daniel