MCM Electronics

Wolfson Audio Card By Wolfson Microelectronics MCM Part #83-15550

4 stars 1 review

Unleash the audio capabilities of your Raspberry PI. We have teamed up with Wolfson Audio to create an unparalleled audio experience for Pi enthusiasts. The Wolfson audio board adds a powerful class D amplifier to the Raspberry Pi. The audio board adds inputs for SPDIF, Line in and Microphone as well as outputs for SPDIF, Speakers and a dedicated Headset port

Specifications Top

wolfson element14

The Wolfson Audio Card, produced in collaboration with Wolfson, the premier mixed-signal semiconductor and audio solutions company, offers Raspberry Pi® users similar flexibility to a PC soundcard to capture audio alongside their camera, and experiment with stereo digital capture and playback.

  • Inputs
    • 3.5mm jack(4-pole) for a headset/boom mic for gaming or VoIP applications
    • On-board MEMS microphone
    • 3.5 mm jack stereo line input for connection to devices such as digital audio players (iPod etc.) or mobile phones
    • SPDIF Coaxial digital
  • Outputs
    • 3.5mm jack(4-pole) for a headset/boom mic for gaming or VoIP applications
    • 3.5 mm jack for stereo line output for connection to devices such as external stereo amplifiers or powered speakers
    • SPDIF Coaxial digital
  • Additional Features
    • On-board class D power amplifier for external speakers, with connection to external power source if needed.
    • Small pin header for additional connections
    • Raspberry Pi form factor

Additional information

The Wolfson Pi Audio Card is based on Wolfson WM5102 audio hub codes. The WM5102 is a highly-integrated low-power audio system for smartphones, tablets and other portable audio devices. It combines wideband telephony voice processing with a flexible, high-performance audio hub CODEC. The WM5102 digital core provides a powerful combination of fixed-function signal processing blocks with a programmable DSP. These are supported by a fully-flexible, all-digital audio mixing and routing engine with sample rate converters, for wide use-case flexibility. Two stereo headphone drivers each provide stereo ground-referenced or mono BTL outputs, with noise levels as low as 2.3µVRMS for hi-fi quality line or headphone output. The CODEC also features stereo 2W Class-D speaker outputs, a dedicated BTL earpiece output and PDM for external speaker amplifiers. A signal generator for controlling haptics devices is included; vibe actuators can connect directly to the Class-D speaker output, or via an external driver on the PDM output interface. All inputs, outputs and system interfaces can function concurrently.

Technical Documents

User ManualUser Manual for Wolfson Audio Card
Safety LeafletWolfson Audio Card Safety Leaflet
Product BriefWolfson: Product Brief for WM5102 Audio Hub CODEC with Voice Processor DSP
DatasheetWolfson: Datasheet for for WM5102 Audio Hub CODEC with Voice Processor DSP
SoftwareImage File for Wolfson Audio Card
SchematicWolfson Audio Card Schematics
Part Numbers
MCM Part #:83-15550
Wolfson Microelectronics Part #:
Package Specifications & Dimensions
Weight:0.15 lbs.
Warranty:365 days
Need to Return?
Length:4 in.
Width:3 in.
Height:1.25 in.
Shipping Information
Extra Shipping Charge:No
Drop Ship:No
Catalog Pages
MCM Cat 57, Page
View in Catalog

Product Reviews Top

  • by Stychokiller

    on 9/26/2014

    Beware of possible revision incompatibilities...

    Overall: 4 out of 5

    The manual for this audio card mentions an 8-pin connector next to the main GPIO connector on the Raspberry Pi. My remaining raspberryPi has no such space for an 8-pin connector, just a bunch of SMD resistors, so this audio device will not work on the pi that is currently not in use in my lab.