I want to simply plug my bass into the Mic input (with 1/4" to 1/8" adapter, of course) on my laptop (built-in soundcard) and then start up iTunes, plug headphones into my phones-out jack on the computer and be able to mix the 2 so I can play along with the music, hearing both in my phones. Does anyone know of any way to do this. I have tried everything and can't figure it out. It seems like such a simple thing. I am running VistaHomePrem. Any ideas???