Fingerprint Sensor AS608 - A Beginner's Guide
One touch can replace keys. This project uses an optical fingerprint sensor to enroll users and then grant access with a quick scan.
read tutorial →
Add CD-Quality Audio Input and Output to Compatible Teensy Boards
The Audio Adapter Board for Teensy 3.0 to 3.6 is a simple way to add high-quality stereo audio input and output to compatible Teensy projects. It is ideal for audio playback, synthesis, voice effects, filters, mixers, and music-reactive builds.
It uses the SGTL5000 audio codec and works with the PJRC audio tools, which makes it much easier to build real audio projects without designing the analog front end from scratch.
Important: This board is an add-on only. It does not include a Teensy board. For a ready match, pair it with Teensy 3.2, Teensy 3.5, or Teensy 3.6.
Why you'll love it
- CD-quality audio: 16-bit, 44.1 kHz stereo input and output
- Stereo headphone and line output: Useful for playback and monitoring
- Line input or microphone input: Supports capture and processing projects
- Works with PJRC audio tools: Faster path to effects, synthesis, and playback builds
- Compact shield-style board: Easy to stack or wire into a Teensy audio setup
Comparison table
| Product | Works with | Category | Main edge |
|---|---|---|---|
| Audio Adapter Board for Teensy 3.0 - 3.2, 3.5 and 3.6 | Teensy 3.2 / 3.5 / 3.6 | Teensy 3.x audio add-on | Line in, mic in, line out, headphone out |
| Teensy 4 Audio Shield (Rev D) | Teensy 4.0 / 4.1 | Teensy 4.x audio shield | Shield-style stereo I/O with microSD support |
| Teensy 3.6 without headers | Audio Adapter Board for Teensy 3.x | Teensy 3.x host board | Faster host board with more RAM and USB host features |
| Teensy 4.1 Development Board | Teensy 4 Audio Shield (Rev D) | Teensy 4.x host board | More I/O and expansion for bigger audio systems |
What you can build
Use it for wav players, voice changers, synth modules, FFT displays, sound-reactive projects, recorders, and embedded audio tools that need line or headphone connections.
Starter bundles
For a complete setup, pair it with a compatible Teensy board, a microSD card, audio cables, and header pins or sockets based on how you want to mount the board.
Recommended add-ons
Helpful add-ons include Teensy 3.2, Teensy 3.6, headphones, microphones, a 25K volume potentiometer, and storage media for audio files.
Technical specifications
| Product | Audio Adapter Board for Teensy 3.0 - 3.2, 3.5 and 3.6 |
|---|---|
| Audio Codec | SGTL5000 |
| Audio Quality | 16-bit, 44.1 kHz |
| Audio Outputs | Stereo headphone and stereo line output |
| Audio Inputs | Stereo line input or mono microphone input |
| Main Interface | I2C control plus I2S audio data |
| Clocking | LRCLK, BCLK, and MCLK from the host Teensy |
| Storage | microSD support on board |
| Revision Notes | Rev C improvements for compatibility and signal behavior |
| Included Board | Adapter board only; host Teensy sold separately |
Pinout & power notes
The board uses I2C for control and I2S for audio streaming. It is meant to work with compatible Teensy boards and is best used with the PJRC audio library and design resources.
Official resources
Official audio adapter page · Teensy Audio Library · Teensyduino setup · Teensy technical specs
For project design, the PJRC audio library and tools are the best outside references for routing, playback, synthesis, filtering, and effects.
What’s in the box
1 × Audio Adapter Board for Teensy 3.x
Frequently Asked Questions
Does this include a Teensy board? No. This is the audio add-on board only.
What audio quality does it support? It supports 16-bit, 44.1 kHz audio.
Can I use it for both input and output? Yes. It supports audio input and output at the same time in supported designs.
Which Teensy boards work well with it? It is a natural fit for Teensy 3.2, 3.5, and 3.6.
Manila stock. Order before 16:00 PHT, ships today via J&T or LBC. Provincial: 1–3 working days.
Schools / class POs: we accept Purchase Orders for accredited schools and universities. contact us with your PO details.
Returns: 7-day inspection window for DOA units. Email proof of issue and we ship a replacement.
Customers also bought
Build with this board
Thumb Joystick - A Beginner's Guide
Wire a joystick to your Arduino, read X/Y, then print UP / DOWN / LEFT / RIGHT to the serial monitor.
read tutorial →Motor Drive (BTS7960 43A) - A Beginner's Guide
Bench-test a 43 A motor driver before wiring the full project. Catches weak power, mis-pinning, and dead boards before they cost you time.
read tutorial →Raspberry Pi Pico (RP2040) - A Beginner's Guide
Coming from UNO and the Pico won't show a COM port? Here's the BOOTSEL trick, the driver fix, and the first sketch that actually works.
read tutorial →Notes from the bench
Ask the community
Project Showcase — show what you built
Share what you built. Photos, BOM, what worked, what didn't.
view thread →How to ask a good question (and actually get answers)
Symptom + what you tried + clear photo = answers within hours.
view thread →ESP32 brownout when wiring a sensor — fixes that worked
Brownout reset when adding a sensor? Notes on supply decoupling and GPIO checks.
view thread →First Arduino — sketch upload error, what to try?
Upload failing on your first Uno? Driver, COM port, board match — checklist inside.
view thread →