The two closest to the edge are ground, you want to jumper the two pads further to the middle of the PCB.
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Audio cable?
Yes, the two closest to the FRONT edge of the PCB, the contacts that connect to the TIP of a inserted 1/4" jack.halides wrote:The two closest to the edge are ground, you want to jumper the two pads further to the middle of the PCB.
.p