Here is what we've been playing with: - Matrix Creator: https://creator.matrix.one/ - ReSpeaker: https://www.seeedstudio.com/s/respeaker.html - Conexant: http://conexant.com (quite expensive, but powerful) We are also waiting for the Matrix Voice, still on Indiegogo, due late Summer: https://www.indiegogo.com/projects/matrix-voice-open-source-.... As mentioned earlier, we will soon release a benchmark of the various mic array solutions, as well as tutorials for setting them up.