Using two audio interfaces simultaneously?

Hi
Not sure if this is an unsual query - will Logic recognise two usb audio interfaces of the same make running simultaneously?
Would they come up as interface (1) and (2)? - I know Pro tools does this if you rack up multiple interfaces - however these would not be 'linked' as such..just put into the two usb ports of a mac book.
Basically I have a single stereo out alesis io2 interface, but need to run two tracks independantly of each other into a desk - so wondered if getting another io2 would be a cheap work around...
Thanks for any help.
Matt

Yes, you can set up an "Aggregate Device" in Audio Midi setup, which Logic will then recognize. This support page tells you how:
http://support.apple.com/kb/HT1215

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