FWIW here is my take on your situation.

Since you don't have an amp and your laptop speakers kinds suck I wouldn't use the Rocksmith Cable. I would buy a Roland Micro Cube amp for $150 USD, sometimes they are on sale as a friend got one for $88 USD:
http://www.sweetwater.com/store/detail/MicroCubeGX

You can either play through the amp as you jam with BiaB or you can use the line out and play and record through your laptop. You could also use a mic and record the amp that way also.

I have a MicroCube and it is one fantastic little amp. In fact it is the only guitar amp I own!

I hope this helps - MarioD


Waitress "How did you find your steak sir"?

Me "I just looked next to the potatoes and there it was"!

64 bit Win 10 Pro, the latest BiaB/RB, Roland Octa-Capture audio interface, a ton of software/hardware