Arduino as a means of audio output...

I am pretty much new to the arduino but I thought that there might be a way to solve my problem with it... I want to use an arduino to output some audio from my computer's software. Is there anyway to create four outputs as quarter inch jacks? (1st and 2nd outputs would be L and R, and 3rd and 4th outputs would be the second L and R). Thanks!

Wouldn't it be easier and probably cheaper to buy a USB sound adapter?

Ah well thats not really what I am looking for... Those aren't quarter inch jacks. I pretty much just want a USB interface without all of the unnecessary inputs and headphone jacks for recording...