Settings to reject WM8978 mic noise during line-in use. #115
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Tested on the Puca DSP board. Settings help reject some unintended mic input on the line-in signal path.
This seems to be more about the WM8978 codec chip than the Puca DSP specifically as the microphones should not be in-path with line-in, but still contribute some signal in loud environments somehow.
This patch to the WM8978 initialization mitigates this greatly, if not entirely.