Video on how to make highquality sound in Arduino, WeMos D1 mimi, ESP8266, using the mp3 decoder WT2003M02.
I bought the module here: https://www.2ram.ru/l/57
Logic level converters can be bought here: https://www.2ram.ru/l/58
My library: https://www.2ram.ru/l/59
The composition I used in the examples: Vans in Japan Tuff Data