I had to re-route the turntable signal to the PC because for some reason, the Nuforce AVP did not work properly with analog inputs! Really?! I thought it would be simple matter to use any audio program to playback the input of the soundcard – not so! After trying a bunch of programs – foobar, Audacity, CoolEdit, etc. I discovered that I need to bypass the kmixer in Windows and use ASIO (for better fidelity and monitoring). Unfortunately, none of the program on hand did that by default, but after some Googling, the solution was simple, I just needed to get a version of Audacity complied to run with ASIO which standard version does not support due to licensing issue.
Here is a shot of the Audacity re-complied to use the ASIO I/O: