Hi @JGKK,
Thanks for joining this discussion, and sharing your experiences!!
Last week I announce a beta version of my node-red-contrib-ui-media-recorder. I want to add also microphone capture to that node (based on the MediaRecorder API), which could help us for this purpose...
Very interesting! But unfortunately this is way out of my comfort zone. 
If you would find some spare time to explain - in dummy language - how you have accomplished this, that would be appreciated! This forum has a "share your project" category that would be ideal 
Such a wake-word detection baked into my node would be an awesome feature...
