Headphones with no mic

Apr 6, 2018
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Headphones have one plug for my new computer and all i can hear is audio. I bought 2 different split (adapter) cables now and none of them worked. My mic isn't coming up in realtek audio manager and I tried all ports for the mic jack.the blue the pink in the back of the computer and the 2 ports on the top of the desktop. None worked. Any suggestions?