Found a helpful Web page!

A project log for AM/FM TunerWing

Add an AM/FM radio receiver to your Feather project

bobgreenwadebobgreenwade 11/24/2019 at 17:390 Comments

After a bit of searching, I came across this Web page that details how to connect a related chip (Si4844-A10) to an Arduino. I'll be taking a close look at that, and adapting it to this project. I might even switch to that chip, or something similar; it looks rather simpler to handle (it's I2C controlled!) than the current Si4836-A10.