I am currently running SIA from an older Stereo Receiver and Turntable. I am using an RCA to Mini Phone Jack from the CD output to my Desktop PC. I have upgraded to a new laptop and am not sure how to connect. I have seen AV-RCA to USB cables but most seem to be designed to get the signal from the laptop to a TV. How can I get the signal from my receiver to the USB port on my Laptop?