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Pinout Diagrams for the PCM2704 and 3D Sound(COB) USB Sound Card Adapters

These are for the two most popular usb sound adapters with the (1) PCM2704 chip and (2) COB (chip-on-board) chip.

(1) USB Sound Card Adapter with PCM2704 chip

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(2) 3D SOUND USB Sound Card Adapter with the COB chip

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How to configure a USB sound card with RetroPie.

 

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