An audio cable uses 1$\mathbf{3.5mm}$ (aux) or 2$\mathbf{2.5mm}$ pins to transmit analogue sound signals between devices.3 Typically featuring 2 (stereo) or 3 (with microphone/control) conductive segments separated by insulators, these connectors ensure reliable audio input and output for headphones, speakers, and other components.
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