Adafruit Audio BFF Add-on for QT Py and Xiao
100 units available with a short lead time.
The Adafruit Audio BFF is a compact add-on board that turns your QT Py or Xiao into a powerful audio playback device. It features a microSD card slot (up to 64 GB) and a MAX98357 I2S 3W amplifier, all designed to fit neatly on the back of your miniature dev board.
The board connects over the SPI port plus four GPIO pins — A0 for SD card select, and A1/A2/A3 for I2S data, word select, and bit clock. It's compatible with ESP32 series, nRF52840, and RP2040 chipset QT Py and Xiao boards.
Key Features
- MAX98357 I2S Amplifier – 3W output, pre-configured for stereo mix with 9 dB gain
- MicroSD Card Slot – Supports up to 64 GB of storage via SPI (A0 for CS)
- I2S Audio Output – A1 (data), A2 (word select), A3 (bit clock)
- PicoBlade-Compatible Speaker Connector – Connect a 4 or 8 ohm speaker
- BFF Form Factor – Mounts directly to the back of any QT Py or Xiao board
- Soldered or Removable – Use pin and socket headers for a removable connection
- Multi-Platform Support – Arduino, CircuitPython, and MicroPython libraries available
Compatibility
- ESP32 series QT Py / Xiao boards
- nRF52840 QT Py / Xiao boards
- RP2040 QT Py / Xiao boards
Important: This board is not compatible with the ATSAMD21 "original" QT Py, as the required pins are not I2S-capable on that chip. Use an RP2040, ESP32, or nRF52840 QT Py instead.
Ideal For
- Compact audio playback projects
- Sound effects for props, costumes, and wearables
- Portable music players and notification devices
- Interactive art installations with audio feedback
Package Contents
- 1× Adafruit Audio BFF Add-on (assembled and tested)
- 1× Header set
Note: Speaker, microSD memory card, and QT Py / Xiao board are not included.
The Adafruit Audio BFF Add-on for QT Py and Xiao appears in the following collections:
SKU AF-5769
by Adafruit
