For whatever reason I cannot even find any hardware alternatives, just some people who hacked the echo Dot’s bootloaders.
If anyone know any alternative hardware and projects to create such a platform, I would be thankful for that.
Unfortunately it isn't going as well as they'd hoped: https://mycroft.ai/blog/update-from-the-ceo-part-1/
Or you could try reSpeaker (different options available): https://wiki.seeedstudio.com/ReSpeaker/
An older interesting comparison of mic arrays: https://medium.com/snips-ai/benchmarking-microphone-arrays-r...
Is there a particular part of this that seems most challenging for you? Would you be interested in developing something to fill this potential gap? I’m toying with a lot of the same tech right now, I’d be glad to contribute.