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)