# I2S Analog Output Test

This is a simple basic test for the ESP32 __analog output__ using I2S.

We just send a generated sine wave and expect to hear a clean signal.
Please note the log level should be set so that there is no disturbing output!

 
### Output Device: Piezo Electric Element

To test the output I am using a piezo electric element

![DAC](https://pschatzmann.github.io/Resources/img/piezo.jpeg)

It should also be possible to connect a headphone to the output pins...


On the ESP32 the output is on the Pins GPIO26 and GPIO27

| PIEZO     |  ESP32
| --------| ---------------
| +       |  GPIO25 / GPIO26
| -       |  GND