I read through this and I have a question. Are you really using computer provided onboard sound and not an external interface? I am confused as to where Realtek audio is fitting into this puzzle. Don't you input your own devices for recording instruments and vocals? I don't really pay attention to other people's setup (as many list them in their sig file) but I don't know of too many who don't have some kind of USB based interface. Did I miss something?