I'd like to connect an output from my Denon AVR-3803 receiver to a Sound Blaster Audigy MP3 sound card in my PC, mainly for the purpose of digitizing my LPs and cassettes. I also would like to record content from my CATV music channels onto the hard drive. The sound card has an anaolg line in. What would be the preferred output from the receiver to use for this? Are there any special considerations or receiver settings to be aware of?