Repurposing the 1/8" jack on the audio shield to be a Line In jack

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LinuxLeah

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I'd like to repurpose the 1/8" jack on the audio shield to be a Line In jack.

Should I be able to simply "cross-wire" the left/right/ground pads adjacent to the headphone jack to the left/right/ground pads on the Line In header?

Would this be a bad idea?

Is there a "cleaner" way to do this?

I wish to minimise line noise. I am okay with cutting some traces if I need to to get the best result.
 
The way is to simply add an extra jack. Whatever you do - never connect the jacks GND to the normal GND. If you really want to go that way, cut all three connections.
 
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