This library is based on pschatzmann/arduino-audio-tools and changed according to Seeed Studio reSpeaker Lite, and is now officially available for Arduino. The supported esp-arduino is 3.0.x or higher.

For more detailed tutorials and introductions to reSpeaker Lite read the Seeed Studio Wiki.

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 https://github.com/limengdu/reSpeaker_Lite-Arduino-Library.git

I recommend to use git because you can easily update to the latest version just by executing the git pull command in the project folder.