Playing WAV Audio Files Using DAC on ESP32 with MicroPython

[hardikofficial963]

Hello everyone,

I am trying to play WAV audio files using one of the DAC pins on the ESP32, which is connected to an amplifier driving a speaker. This is possible in the Arduino framework using the following library:

🔗 Arduino Library: XTronical_XT_DAC_Audio

However, I would like to achieve the same functionality in MicroPython.

My Questions:

1. How can we play WAV audio files using the ESP32’s built-in DAC in MicroPython?
2. Are there any existing MicroPython libraries or efficient methods to handle audio playback?
3. What would be the best way to stream or buffer audio data to the DAC for smooth playback?

If anyone has worked on something similar or has insights, I would really appreciate your guidance. Thanks in advance!

[PsuFan]

Why not just use DFPlayer Mini? https://www.amazon.com/dp/B07JGWMPTF

[davefes]

Maybe, something here:
https://awesome-micropython.com/#audio

[PsuFan]

I've used it fine with esp32, offloads processing and storage. I dont know why they are all uart, wish there were i2c versions.

[jonnor]

There is example code for doing this with I2S peripherals at https://github.com/miketeachman/micropython-i2s-examples/tree/master/examples

[sqfield]

The I2S driver does not support using the internal DAC yet.
If it did, it would be easy to get good clean audio from a WAV file without any extra hardware on the ESP32.