When you add microphone support to the 3.5mm jack, there has been 2 competing standards.. one eventually won but to this day I still stumble upon that old devic

When you add microphone support to the 3.5mm jack, there has been 2 competing standards.. one eventually won but to this day I still stumble upon that old device or headphones that is incompatible.. https://hardwarerecs.stackexchange.com/questions/15086/how-do-i-know-if-a-headphone-jack-is-omtp-or-ctia https://hardwarerecs.stackexchange.com/questions/15086/how-d...