Different in/out audio sources possible?

Question

Is it possible to use one audio source for input and another one for output in Logic Pro 7.1 on MacOS 10.4.2?
This is what I'm trying to do:
- Audio in: Logitech USB Headset (mic and headphones)
- Audio out: Emagic A62m (external USB sound card)
The problem is, I can only select one audio driver in Logic. If I select the USB headset, I can record with the headset mic, but then all outgoing sound from Logic is played through the headset only. If I instead select the Emagic A62m audio driver, the sound is played through the sound card but I can't use the headset mic to record.
The system sound and sound from all apps except for Logic is played through the Emagic soundcard, which is set up as default sound out in system prefs. The headset is set as the default input source.
The Emagic sound card doesn't have any mic-in port, neither has my Powermac G5. I can't afford a soundcard with a mic input PLUS a good quality mic. This is why I plan to buy a good quality USB mic like
-Blue Snowball (http://www.macobserver.com/columns/rantsandraves/2005/20050722.shtml) or
-Samson C01U (http://www.samsontech.com/products/productpage.cfm?prodID=1810&brandID=2)
But unless I find out a good way to use the mic as a mic and loudspeaker at the same time :-D it seems that it will be pretty impossible to use a USB mic with Logic?
Even in such a simple app as Garageband it is possible to select a different source for sound in and sound. How can I setup Logic the way I need?

Answer 1

since apple took over logic, and the development into OSX.. the way audio, midi and logic work are all tied in at an operating system level. so it's just how you look at it: from tiger onwards, logic does have this feature built in.
for them to go and add separate audio features to logic now would be a complete reversal of everything that was intended with OSX and core audio.