I am working with a : dell inspiron 1525 pentium dual core 2.20 GHZ 4 GB ram IDT sound card sure this isn't an optimal audio system. However I don't understand why pro tools 9 wont run without an audio interface on this system? I've read everywhere and all ppl say is asio4all.com. However, I don't want to just download something to make it work based on the 3 word answers most ppl give so they don't have to waste time explaining things to ppl who won't understand them anyway. I'm the guy who will invest his time and energy into understanding why things work so I don't have to ask the same question over and over. So please... help me understand why: a) my system isn't asio compatible? b) why my system needs 3rd party drivers when protools 9 states that no audio interface is needed? c) can i set up an aggregate i/o on my laptop using just the soundcard and mix on the go without, both ilok and hardware, and this asio4all driver? thank you guys, this is my first post so if I'm not being clear or if there is something i can do better to aid the ease of response please let me know!