Audio spectrum analyser with sine sweep using Pimoroni Galactic Unicorn with electret microphone

This is a slightly modified version of the beta Pimoroni spectrum analyser code running with values coming from the electret microphone on a SparkFun Sound Detector soldered onto its Pi Pico W. The values are read continuously from the GPIO/ADC using DMA. The display range is currently fixed at approximately 50-2500Hz using the microphone.
Instructables article describing the Guitar Tuner and Audio Spectrum Analyser: www.instructab...
Instructables article for adding a microphone to Space Unicorns: www.instructab...
Sine sweep courtesy of • 20Hz to 20kHz (Human A...

[@kevinwalters2076]

I've written an articles on Instructables with the software, notes on how to add a microphone and an explanation of how this all works: www.instructables.com/Making-a-Guitar-Tuner-and-Audio-Spectrum-Analyser-/