The Rasperry Pico Core implementation provided by Arduino is based on MBED and does not have any I2S implementation. The core from Earle Phil Hower however has one which relies on the pico-extras from RaspberryPI.

I am combining these two solutions as a separate Arduino Library, so that anybody who wants to use the MBED implementation can use I2S as well.

Documentation

Here is the class documentation

Installation

You can download the library as zip and call include Library -> zip library. Or you can git clone this project into the Arduino libraries folder e.g. with

cd ~/Documents/Arduino/libraries

git clone pschatzmann/rp2040-i2s.git