It will have a:
- heart - the clock
- brains - the controller(usually usb)
- ears - In's
- voice - Out's
- body - the case
Consumer grade sound card might look like http://www.xmos.com/products/silicon/xcore-audio/hires
This is one of those projects that will never end..
Just found BeaglePowered option https://hackaday.io/project/9634-beaglebone-multi-channel-audio-card-ctag-face24
Suggest your links