Oh, I get it... you're talking about just connecting guitar into iphone/ipad with better sound than you get with iRig - Rocksmith per se doesn't figure in it. I thought the discussion was about recording RS play on Amplitube. I actually went so far as to get a cable plug splitter (no idea what the proper name is) so that I could record my RS play on Amplitube simultaneously with and without the full song as accompaniment (once on phone and once on ipad). The unaccompanied results were deeply sobering.
For recording I use a cheap $30 samson? Mic......i split my guitar to he amp and ps3, Put the mic in front of my amp, record with th iPad.
I post from my iPad most of the time so forgive the typos!
Running RS14 on PS3 and on Macbook:
2.3mhz intel core i7
Intel HD Graphics 4000 384MB - built in
Nvidia GT 650 512mb
taylor 210e deluxe acoustic
PRS Santana SE - modded with EMG 81/85 active pups, locking tuners, Tremol-NO
PRS SE 245
Gibson Les Paul Traditional Plus - classic 57 pups
Gibson 1941 J-35
mxr phase 90
mxr micro flanger
mxr smart gate
digitech whammy pedal
crybaby 535q wah
I didn't much like the iRig, either, so I bought the Ampkit cable. I've also got Ampkit and Garage Band waiting to try out, but RS has been taking all my guitar time.