pasdesignal’s developed an audio “daughter board” for raspberry pi:
I intend to develop this as an open-source project, so follow along if you want to build one yourself. The smallest parts are 0805 so no problem for hand soldering. Version 1, using this WM8731 CODEC chip will be ready soon for public consumption. 9V DC supply (guitar pedal type) will power the whole board including the pi itself. You will spot some bodge-wires (how could I get the DC connector pins wrong???) and dirty hacks in the photo: this is definitely a work-in-progress!
Follow the project here!
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