Recommendation for 2-Ch Audio Subsystem

I need to add an audio subsystem to my custom OSD335x-SM board. I need to be able to play different audio streams on two different stereo channels.

I’ve looked at the McASP module present on the chip, but I really have no clue on what IC to interface to and whether or not it will have good support on Linux, specially if I need two channels. When I say two channels I don’t really know if I need two separate audio cards present on the system or if I just need one audio card with multiple channel support. In the later case, I don’t know if I will really have the ability to play different streams on each channel.

Also, I’ve thought on using USB audio cards (like C-Media chipsets) that seem to have good support on Linux. Essentially, use two C-Media chips that will be recongnized as two different USB audio cards.

Do you have any recommendation on how should I proceed? I like the idea of using the internal McASP peripheral (if I get to know how to interface it), but also I need to have a working prototype ASAP, so USB seems like the way to go for now.

Thank you in advance.