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The Wolfson Audio Card solves this by providing similar audio flexibility that would be provided by a PC soundcard. Not only this but the Wolfson Audio Card was produced in partnership with Wolfson, the premier audio solutions chip company, to produce superior sound capabilities for the Raspberry Pi.
The Wolfson 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.


Key Applications:


  • Audio applications

  • For Use With: Raspberry Pi Model A/B Rev2 or later w/ P5 Pads



Kit Features:


  • 3.5 mm jack (4-pole) for a headset/boom mic combination for gaming or VoIP applications

  • 3.5 mm jack for microphone input

  • 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

  • 3.5 mm jack stereo line output for connection to devices such as external stereo amplifiers or powered speakers

  • Phono jack for electrical (not optical) S/PDIF digital input

  • On-board class D power amplifier for external speakers, with connection to external power source if needed.

  • Small pin header for extra functions if they are low cost, already on-chip, and don’t require any further components

  • Raspberry Pi form factor

Wolfson Pi Audio Card

Technical Documents:


Learning Center

TypeDescription
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


Learning Center

TypeDescription
SoftwareImage File for Wolfson Audio Card
SchematicWolfson Audio Card Schematics
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