TinyML is an incredibly powerful piece of software, and you can easily train your own model and deploy it on an ESP32.
If you're looking for a way to turn your Bluetooth speaker into a Spotify Connect device, then this is the way.
Byrne and Taguchi (1986) report the use of a fractional factorial design to investigate fitting an elastomeric connector to a nylon tube as tightly as possible. Their experiment applies the design ...