I'm trying to record an XLR mic and laptop audio simultaneously on a Marantz PMD 661. I am connecting the laptop's headphone jack with the LINE IN2 of the Marantz with a mini-to-mini cable. I have only been able to record the XLR mic but no laptop. Does anyone have any advice if this is generally possible? And if so, what are the settings to make this configuration possible? I would appreciate any advice!