Can you hear me now? Audio jack switches could be the answer. - Automotive - Technical articles - TI E2E support forums
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How to Hack a Headphone Jack
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How to Hack a Headphone Jack
Phone connector (audio) - Wikipedia
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Delock Products 62498 Delock Cable Stereo jack 3.5 mm 4 pin > Stereo plug 3.5 mm 4 pin (changes the pin assignment)
DIY Audio Electronics from Zynsonix.com: Headphone Connectors & Pins / Pinouts for DIY
