I share all of these concerns with facial recognition technology, @MarianDrake. It’s scary stuff.
To be clear, if I were to do anything with this technology in Strum Machine (or voice recognition or any other “smart” features) it would only be if I could be 100% sure no data left your device or could be used for any other purposes.
And to be honest, I think the odds of this happening are low… but I’m not against looking into it further if I can do it in this complete-privacy way.
In the meantime, though, for hands-free controlling of Strum Machine I think a Bluetooth foot pedal is the way to go. I’ll be adding better support for these (customizable commands for multi-switch pedals) in the future as well.