Adafruit
Adafruit Audio FX Mini Sound Board - WAV/OGG Trigger - 16MB
The Adafruit Audio FX Mini Sound Board is a standalone audio trigger that plays WAV and OGG Vorbis files — no Arduino or programming required. Simply drag an...
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The Adafruit Audio FX Mini Sound Board is a standalone audio trigger that plays WAV and OGG Vorbis files — no Arduino or programming required. Simply drag and drop sound files over USB, wire up buttons to the trigger pins, and you're ready to go. With 16 MB of built-in flash storage, it holds approximately 15 minutes of compressed stereo audio.
Measuring just 1.5" × 0.9", this board is purpose-built for props, costumes, toys, and other portable projects. It runs from 3–5.5 VDC and features stereo line-level output for headphones, powered speakers, or an external amplifier.
Key Features
- Standalone Operation – No microcontroller required; just power and buttons
- 16 MB Built-in Flash – No SD card needed; approximately 15 minutes of compressed stereo audio
- USB Mass Storage – Drag and drop files via micro USB as if it were a USB drive
- WAV and OGG Vorbis Playback – Up to 44.1 KHz, 16-bit, stereo
- 8 Trigger Inputs – Connect buttons or switches to trigger audio playback
- 5 Trigger Modes – Basic, hold looping, latching loop, play next (sequential), and play random
- Stereo Line Output – AC-coupled left and right channels
- UART Control – 9600 baud serial interface for microcontroller integration with Arduino library support
- Compact Size – Only 1.5" × 0.9" (38 × 23 mm)
- 3–5.5 VDC Power – Works with AAA battery packs or LiPo batteries
Trigger Modes
-
Basic –
Tnn.WAV/Tnn.OGG– Plays once when trigger pin is grounded -
Hold Loop –
TnnHOLDL– Plays and loops while pin is held low -
Latching Loop –
TnnLATCH– Toggle on/off with button press, loops until pressed again -
Play Next –
TnnNEXT0–TnnNEXT9– Plays files sequentially on each press -
Play Random –
TnnRAND0–TnnRAND9– Plays a random file on each press
Also Available
- Audio FX Mini Sound Board – 2 MB – Lower-cost version with 2 MB flash
Ideal For
- Props and costume sound effects
- Interactive toys and exhibits
- Haunted house and holiday decorations
- Portable audio triggers for performances
Package Contents
- 1× Adafruit Audio FX Mini Sound Board (16 MB)
Jargon buster
Plain-language definitions for the technical terms used above.
- baud
- Baud is the signalling rate of a serial connection, often used as the speed setting for UART communication. Matching the baud rate matters because both connected devices must use the same setting for readable data.
- LiPo
- A LiPo (lithium polymer) battery is a rechargeable lithium battery widely used in portable projects because it is light and compact. LiPo cells need correct charging circuitry and careful handling to stay safe, so equipment that supports LiPo generally includes charging or protection hardware suited to that battery type.
- microcontroller
- A microcontroller is a small computer on a single chip that runs a stored program and controls connected inputs and outputs such as buttons, sensors, displays and communication interfaces. In a device built around one, it is the part that executes the code and coordinates the device's behaviour.
- polyphonic playback
- Polyphonic playback means the board can play more than one sound at the same time. This matters for installations or instruments where sounds may overlap instead of cutting each other off.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
- USB mass storage
- USB mass storage is the standard USB device class used by many flash drives and external storage devices. If a board supports it, your project may be able to read and write files on compatible USB storage, provided the software library also supports the device.
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