I would just like to use a couple of USB microphones plugged directly into my comp to record and mix guitar, but I'd like to use pro tools. I also have Adobe Audition. Is there anyway I can do this without an interface or buying anything else?

An example of this would be plugging two mics in and recording two guitars at the same time on two different tracks. How would I go about doing this without using a mixing board or interface.

im pretty sure you need to buy a pro tools compatible interface/pre-amp to use the software.