Thanks for sharing. This is great. I appreciate the additional insight in the comments on the software behind it for the guitar effects & tones. Kudos on the experimentation and iterations to meet your needs. Wish I would have seen this for a potential DIY project before I went in on purchasing the SPARK amp for at home practices and FXs.
I became aware of Spark a couple of weeks ago. On the one hand, I was irritated that someone else was on the same "voice-controlled guitar playing" thread as me, but then (a) it's validating and (b) they're not really going the same place I am.
Thingamagig understands the underlying composition which means it can automate tones, loopers, lights, cameras, etc. That need was the genesis of this project and that's where its going. Everybody else (including Spark, Fender Play) seems to think the playalong is the end goal, which is why they short circuit the hard work of building the composition library by integrating Spotify or whatever.
Maybe they're right. Maybe I'm right. Maybe we're both right. We'll see, I guess.