Oh, definitely. I just need to figure out which i2s device to get, because there are about 3,756,228 different varieties, but only one has an input (the Wolfson/Cirrus card), but it's unclear if that actually works with Pi2 + Volumio/Squeezelite.

Recently, I've just been using the SPDIF out on my CD player straight into the transformer to SpeakerLink.... but that's significantly less humorous than the current Pi-based setup.

At any rate, I'm interested if anyone has a complete list of the serial commands for the M6, or more information about the EBA commands specifically.