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Green circuit board with 3.5 mm jack and micro-SD slot

MCDODO

MCDODO 4 Audio Shield Rev D for Teensy 4.0

SKU CH-1KHY-DVDKF

Adds stereo audio input, output and micro-SD storage to a Teensy 4.0 via a 3.5 mm jack and optional volume control

  • TypeSingle Board Computers
  • Simultaneous audio input and output via 7 signal connection
  • Stereo headphone, line output and line or mic input options
  • 5 mm jack, micro-SD slot, optional potentiometer and flash memory
  • Ready-to-use audio library simplifies programming
  • Requires separate Teensy 4.0 purchase for operation

Teensy 4.0 Audio Shield Rev D

The MCDODO 4 Audio Shield Rev D is an add-on board built for the Teensy 4.0 development platform. It provides stereo headphone and line-level output alongside stereo line-level or mono microphone input. A 3.5 mm audio jack and micro-SD card slot are fitted, with optional pads for a 25k potentiometer and flash memory chip. The shield requires a separate Teensy 4.0 board to operate.

Seven-signal audio interface

Audio data travels between the shield and the Teensy 4.0 over seven dedicated signals. This connection enables simultaneous input and output operation for real-time processing. The Rev D revision is compatible only with Teensy 4.x boards and will not function with earlier Teensy models. An audio library is available to simplify software development.

Stereo I/O with on-board storage

The board comfortably handles stereo playback and recording tasks using the integrated audio codec. Audio files can be stored directly on a micro-SD card inserted into the on-board slot. Headroom is limited to the two-channel analogue paths provided; applications needing multi-channel surround or additional analogue inputs cannot be met by this shield.

Highlights

  • Simultaneous audio input and output via 7 signal connection
  • Stereo headphone, line output and line or mic input options
  • 5 mm jack, micro-SD slot, optional potentiometer and flash memory
  • Ready-to-use audio library simplifies programming
  • Requires separate Teensy 4.0 purchase for operation

Specifications

TypeSingle Board Computers

Questions about this item

Should I choose the Rev D shield for a Teensy 4.0 or an earlier board?

Rev D is compatible with Teensy 4x only, so you need a Teensy 4.0 for this shield to work.

What does the 7-signal connection mean for audio performance?

The audio chip connects to the Teensy using 7 signals, enabling simultaneous stereo input and output for real-time processing.

How does the 3.5 mm jack and micro-SD slot affect the audio workflow?

The 3.5 mm jack handles headphone or line output, while the micro-SD slot stores audio files for playback without extra hardware.

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