Yeah we aren't using the seeed array in the final Mark II. But we have used the same XMOS XVF-3510 to perform acoustic echo cancellation. That means, even with music blasting out of the speakers, you can still wake the device from across the room.

In a simple fashion you can think of it as subtracting the audio being output from the audio coming in from the microphone.

I was talking about Rhasspy though. As nice as your devices look, tiny satelites are mandatory for me to replace alexa.