Just to let Seeedstudio know:
I still find that the 2018-08-06-raspbian-for-respeaker.zip SD card image from Seeed, with no added code, recognized the round 4 mic hat, but does not show 4-Mic Linear Array hat in preferences/audio device settings. This May Be A Problem.
Reviewing the most obvious difference: the Seeed CD image comes with a home/pi/respeaker directory, while my installation of the Seed-Voice drivers on a Google AIY CD image results in a home/pi/seeed-voice directory.
I did find my original problem after adding the seeed-voice drivers to a Google AIY version 1 SD image, was just the channel volume slider 3 being off, I has never touched this, perhaps came from Google this way (dumb me).
I now have all 4 channels recording in Audacity on both the round 4 speaker hat as well as the 4-mic Linear Array Hat, running in the AIY Raspbian SD image.
Thanks for your patience…