Hello me again,
Another difference between Arduino and Teensy is the number of IO pins.
Arduino has 14 pins.
Teensy has 34 pins.
It`s possible to connect this Microphone break out board to teensy or are there any restrictions?:
SparkFun Sound Detector
I like it because of the different output modalities. Also because it`s possible to change the gain easily with a potentiometer.
https://learn.sparkfun.com/tutorials/sound-detector-hookup-guide