Bluetooth Audio Receiver with PCM5102A - Uwe's Tinkerblog
Build Your Own Custom Bluetooth Speaker with ESP32 & A2DP | DIY Audio Project - YouTube
Bluetoothスピーカーの自作<ESP32ボード+既製PCM5102 DAC> - Diary of Engineering
Easy ESP32 Bluetooth Speaker - YouTube
GitHub - pschatzmann/ESP32-A2DP: A Simple ESP32 Bluetooth A2DP Library (to implement a Music Receiver or Sender) that supports Arduino, PlatformIO and Espressif IDF
A Beginner's Tutorial on ESP32 Bluetooth | Learn ESP32 Classic Bluetooth