I have a TRRS connector for my Android phone. I want to be able to enable/disable the mic on the cable using a button.
So for this I have connected a 1.2 kOhm resistor to a button and when its 'on' it will create a bridge over the Mic and ground connector, successfully muting the mic. If I leave it 'off', the microphone inputs data normally.
The problem is, the only way the Android phone uses the external MIC input when connecting the cable for the first time is when the button is 'off'. If I connect it when the button is 'on' it will not switch to the external 'muted' mic.
Is there a way to force this behavior, connecting a 'muted' microphone over the TRRS connector?