Here are some more good Digi-Key blog articles that I found. First, some recommendations on using low-pass filters with analog inputs for the sake of anti-aliasing. Of course, to some extent depending on your particular application, this may be a judgment call depending on whether you want to have that particular anti-aliasing effect at the expense of lower resolution.
20200327/https://www.digikey.com/en/articles/the-basics-of-anti-aliasing-low-pass-filters
Second article, ways to improve the driver circuit for a piezo buzzer. Wow, now this is interesting… so the basic driver circuits don’t give you the best output, but if you want some more “Hi-Fi” like output, you can use some of these more complicated and expensive driver circuits.
20200327/https://www.digikey.com/en/articles/techzone/design-techniques-to-increase-a-piezo-transducer-buzzer-audio-output
But, the ultra article discovery, RISC-V development boards? Wow, that’s becoming a bigger and bigger thing so it looks.
20200327/https://www.digikey.com/en/articles/how-to-get-started-with-risc-v-based-microcontrollers