When I first got Rocksmith (RS) I was trying to figure out the best way to hear me playing along with the backing track. I started out just listening the PC speakers but to be honest, they were lack luster. I then switched to headphones, they protect everyone else from my noise and they all me hear everything but, they were literally making me deaf. After playing my ears would be ringing (I know I could turn it down but then you don’t get the same feeling). So, eventually I got my VOX guitar amp out and set up my computer output to go straight into my amp.
The VOX amp has all kinds of built in effects but RS has the effects built in so I just wanted to amplify the output clean. I set the VOX up to do that and now when I play I hear my guitar with the RS effects and the backing music and lyrics all through my amp. Of course with my amp, I can make it much louder than I need it so I try to manage that carefully so as not to shake everything off the shelves!
The setup is pretty simple, I connect the RS realtone cable from my guitar and into the computer as normal. I have a cable that runs from the computers headphone jack to the guitar amp input (1/8 to 1/4). I bought a cable to do this that is long enough to reach between the two without issues. – I know this is just using the amp as a glorified PC speaker but it works for me. I also have a cable splitter that will allow me to cable to the computer and separately to the guitar amp. This gives me the guitar sound coming from the amp and the RS sound coming from the computer. The problem for me is then I have to create effects to make my guitar sound the way it should for each song. Although that sounds like fun, it will take way more time than if I just work the way I have it now.