How do I record the chat of people talking on my xbox360 using elgato video capture?

Video Q&A
I can get audio fine but I want to know how to get the chat volume of people talking on my xbox 360 using elgato video capture. Like people laughing or reactions to stuff. I can’t really manage to get it. I need it for funtages n stuff.

Elgato 10020840 Video Capture Device

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VÃdeo de DescriptionTransfer of the product of a VCR, DVR, the box of fix-covers, videocÃmara or of cualquie another source video anÃloga to his mac like iTunes-ready file. Software fÃcil to use it directs to him with each step, to connect a source video anÃloga, â ? ¦. MÃs & gt; & gt;
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Elgato 10020840 Video Capture Device
Technical information:

• Transfer video from a VCR, DVR, camcorder or any other analog video source to your Mac
• One-click export to iTunes, QuickTime and iMovie
• Direct upload to YouTube
• Captures NTSC, PAL and SECAM. Features Composite and S-Video inputs
• Records in iTunes-ready high quality H.264 or MPEG-4 files

Elgato 10020840 Video Capture Device