If you were to wire a 4 pin audio cable to a 3 pin jack which two wires would be joined? Eg. TP120 jack being replaced with a 3.5mm jack. - Quora
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Amazon.com: Fancasee 4 Pack 3.5mm Replacement Repair Plug Jack TRRS 4 Pole Stereo Male Plug 1/8" 3.5mm Solder Type DIY Audio Cable Connector for Headphone Headset Earphone Microphone Cable Repair : Electronics
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