The ESP8266 has a hard time using software to bit bang signals to the glorious WS2812's.
Conveniently, the ESP8266 MP3 Player project outputs to I2S for its sound, so I was able to rip its guts out and trick it into output signals for WS2812.
This project makes a UDP->ESP8266->WS2812 bridge.
Components
1×
ESP8266 Module
Any will do!
1×
WS2812B's
Any quantity will do (well ~300 or less)
Is your code available on GitHub please?