I suppose that's a broad subject with many possible answers so let me be more specific - I want to plug in a guitar and mic simultaneously using an iRig Pro Duo, so I can play and sing at the same time, giving each channel its own independent effects. Does IK Multimedia have a solution for that? I already own Amplitube and several other apps, just have no clue about the most stable and simple way to implement everything. All attempts so far have been very glitchy. Any input appreciated.