Seems Volumio is gaining strength, nice to see!
I would like to plug the world first GPIO multichannel sound card for the Pi. It can do 6 channels of input and 8 channels of output. It allows custom breakouts and one set of breakouts is pro quality balanced.
Check it out on kickstarter :
kickstarter.com/projects/12 … he-raspber
Get the behind the product story :
forum.xda-developers.com/raspbe … h-t3541058