VS1003B MP3 Board Complete and cost-effective audio solution, MP3 decoder included
Gallery | ESP8266+STM32 WiFi USB MP3 Dongle | Hackaday.io
GitHub - IEEE-University-of-Houston/Rave2Go-An-STM32-Intro: Delve into the world of STM32 Microcontrollers in the effort to build a functioning MP3 player with LED Matrix!