Assistance with Recording Audio directly from my laptop

I have logic pro and I use a audio interface (M Audio firewire 1814). I have two synths and a mpc hooked up and working well. If I am listening to something off the internet or sounds from my internal soundcard and want to record the audio, what input information do I need to use? I can see activity in my interface 1/2 sw rtn window and hear the audio but can not find out how to record the audio. Thank you for any assistance you can provide!