I was thinking it could be a power issue as well but i did not fare any better on the pi3b with a phat dac and ps eye. Interestingly, in my haste to bring things back over to the Pi3b i missed a critical step of installing Alexa in the /opt directory. I did have audio then, but of course I did not have Alexa working so I went back to the drawing board.
I even tried installing pulse before Alexa with no luck.
Unfortunately, I will have to take a few days off as my sd card snapped after i forgot to remove it from the pi3b before encasing it. For what it's worth, I have been toggling back between the two asound configurations: