I'm sorry I think I don't understand what you're attempting to do. Could you please describe it?<br />It sounds like you're creating a loop into your laptop.<br /><br />If it's plugged into your laptop via USB then that's all you need in order to use it. Audio is sent via USB from your laptop to the T1. At that point you connect your headphones to the headphone jack on the T1. Alternately you can use the T1's RCA audio out jacks on the back to connect the T1 to something like a stereo system or powered speakers.