Pico Audio – Audio Module for Raspberry Pi Pico (Inc. Speakers)

The Pico Audio is an audio expansion module and speaker set designed for the Raspberry Pi Pico.

The module incorporates a CS4344 low-power stereo decoder and uses the I2S bus for transmitting audio signals. It supports a wide range of audio sampling rates and allows 3.5mm headphone and speaker signal output at the same time via the onboard APA2068 amplifier!

The board includes a small volume control dial and audio decoder observation pads. A set of 8-ohm 5W speakers are included which come with a 4-pin connection that matches the onboard connector.

Raspberry Pi Pico not included. You’ll need a Pico with male headers soldered to it. You can grab a Pico here and Pico male headers here, or buy a Pico with pre-soldered headers.

Features

• Standard Raspberry Pi Pico header, supports the Raspberry Pi Pico
• Standard 3.5mm audio jack, for connecting an external headphone
• Dual channel speaker headers, for direct driving speakers
• 8~384000Hz audio sampling rate
• Stereo sound effect output
• Using 3-wire I2S, effectively reducing EMI
• Comes with online resources and manual (Raspberry Pi Pico audio play code, sound card code)

Specification

• Operating voltage: 5V
• Audio Decoder: CS4344
• DAC SNR: 106 dB
• Logic level: 3.3V
• Audio bus: I2S
• Speaker driving: 2.6W/channel (4ohm BTL)

Resources

• Product Wiki

Package Contents

• 1x Pico Audio Module
• 1x 8Ω 5W speaker set

Raspberry Pi Pico not included

What’s Onboard?

1) Dual channel 4-wire speaker header
2) SMD adjustable resistor
– Speaker output volume adjustment
3) Audio decoder output observing points
4) 3.5mm standard headphone jack
5) RT9193-33
– 3.3V linear regulator
6) CS4344
– Audio decoder, 3-wire I2S bus
7) APA2068
– Audio power amplifier
8) Raspberry Pi Pico header
– For connecting Raspberry Pi Pico

Pinout

Revision History

• As of 18/10/2022: We are now stocking the updated version of this product, which includes some changes to the chips used on the PCB as well as some GPIO pin changes. Previous pinout:
• GP26 = DIN
• GP27 = BCK
• GP28 = LRCK