DEV-15165 Reference Design | Audio Power Amplifier | Arrow.com
Improving the Sparkfun MP3 Trigger – Zach Poff
Qwiic MP3 Trigger Hookup Guide
MP3 Trigger
multiwingspan
SparkFun MP3 Trigger - WIG-13720 - BC Robotics
GitHub - sansumbrella/MP3Trigger-for-Arduino: A simple Arduino interface for the SparkFun MP3 Trigger. Put it in a folder called "MP3Trigger" inside your Arduino/libraries folder