The Teensy is a complete USB-based microcontroller development system, in a very small footprint that is compatible with the Arduino ecosystem.
Teensy products are manufactured by PJRC.
Teensy Audio Board
USB Host -kaapeli (Teensy 3.6)
Teensy Header Kit
OctoWS2811 Adapter for Teensy (Controller for Neopixels/WS2811 LEDs)