The chip is an ESP32-S2 that does Fast Fourier Transform trickery to allow for real-time updates to the RGB ... accessory port upgrades and 3.5 mm audio input to bypass the on-board microphone.

An additional benefit of the enhanced analysis bandwidth is that the Real Time Spectrum Analyzer (RTSA) now has an industry leading maximum span of 150 MHz. An RTSA has become the essential tool ...

That’s not necessarily a good thing, but I like surprises as much as the next person, so I was happy to learn that I was now the owner of a tinySA spectrum analyzer. Time for a look at what this ...