Review on 🔊 Teensy 4.0 Audio Adapter Board by Doug Darling

Pjrc has written library support making the SGTL5000 chip easy to access for any maker or audio tinkerer. Make sure you isolate transformers for ground loops, which are the most likely source of noise. With proper isolation, this panel contains almost no noise. The effects, graphic EQ, delay, surround sound, etc. are easy to program and well documented on PJRC's easy-to-use GUI website. These boards (and the 3x Compat boards) are my favorite boards for audio processing and spectrum analysis projects.