Dave,

I own the iRig HD 2. I have bought a number of the Amplitube sims on iOS, include the Brian May pack. I connect my iRig to an iPad (or iPhone) and then into headphones. Sounds pretty good. I use it for 'family room' practice. I can fire up a song on Spotify and play along using the iRIg. Everything comes through the headphones. I've even run Guitar Tricks lessons on the iPad using the iRig.

I've played around with the PC version of Amplitube too but don't use it very often.

Let me know if you need more info.

Ron