I'd instead recommend the BeagleBone Black for projects if you want a mature, well-documented platform, or any number of the new exciting ARM-based platforms coming out if you wanted to venture into something new.
Did you have positive experiences with the BeagleBone Black audio capabilities?
It looks like the internal audio is not bad but is available only via HDMI
There are also a couple of solutions to have audio inputs and outputs, but I'm not sure about the quality of the codec used: