(See the README.md file in the upper level 'examples' directory for more information about examples.)
In this example, you can choose music mode or echo mode in menuconfig. In music mode, the example will play a piece of music in 'canon.pcm', and in echo mode, you can hear what you said in earphone.
## ES8311 brief
ES8311 low power mono audio codec features:
- High performance and low power multi-bit delta-sigma audio ADC and DAC
- I2S/PCM master or slave serial data port
- I2C interface for configuration
- ADC: 24-bit, 8 to 96 kHz sampling frequency
- ADC: 100 dB signal to noise ratio, -93 dB THD+N
- DAC: 24-bit, 8 to 96 kHz sampling frequency
- DAC: 110 dB signal to noise ratio, -80 dB THD+N
For more details, see [ES8311 datasheet](http://www.everest-semi.com/pdf/ES8311%20PB.pdf)
Note: Since ESP32-C3 & ESP32-H4 board does not have GPIO 16/17, you can use other available GPIOs instead. In this example, we set GPIO 6/7 as I2C pins for ESP32-C3 & ESP32-H4 and GPIO 16/17 for other chips, same as GPIO 18/19, we use GPIO 2/3 instead.
This example is based on [es8311 component](https://components.espressif.com/component/espressif/es8311)
The component can be installed by esp component manager. Since this example already installed it, no need to re-installed it again, but if you want to install this component in your own project, you can input the following command:
If the dependency is added, you can check `idf_component.yml` for more detail. When building this example or other projects with managed components, the component manager will search for the required components online and download them into the `managed_componets` folder.
You can find configurations for this example in 'Example Configutation' tag.
* In 'Example mode' subtag, you can set the example mode to 'music' or 'echo'. You can hear a piece of music in 'music' mode and echo the sound sampled by mic in 'echo' mode. You can also customize you own music to play as shown below.
* In 'Set MIC gain' subtag, you can set the mic gain for echo mode.
* In 'Voice volume', you can set the volum between 0 to 100.
### Build and Flash
Build the project and flash it to the board, then run monitor tool to view serial output:
```
idf.py -p PORT flash monitor
```
(To exit the serial monitor, type ``Ctrl-]``.)
See the Getting Started Guide for full steps to configure and use ESP-IDF to build projects.
## Example Output
Running this example in music mode, you can hear a piece of music (canon), the log is shown as follow:
If you have a logic analyzer, you can use a logic analyzer to grab GPIO signal directly. The following table describes the pins we use by default (Note that you can also use other pins for the same purpose).
