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David Gwilliam
2026-02-12 21:00:02 -08:00
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libraries/audio-tools/examples/examples-stream/streams-generator-analog/README.md Normal file
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# 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 to Warning so that there is no disturbing output!
Make sure that you do not use any noisy power supply!
### Output Device: Earphones
You can also use some simple earphones
![DAC](https://pschatzmann.github.io/Resources/img/earphones.jpg)
On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
| Earphone| ESP32 | UNO R4 |
| --------| -----------------|---------|
| Left | GPIO25 | A0 |
| Righ | GPIO25 | GND |
| GND | GND | GND |
### 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)
On the ESP32 the stereo output is on the Pins GPIO25 and GPIO26
| PIEZO | ESP32 | UNO R4 |
| --------| -----------------|---------|
| + | GPIO25 | A0 |
| - | GND | GND |