AM5728: controlling stereo input through external button

Part Number:AM5728

Hai,

i am using am5728 GP evm. i am looking for a way to enable only mic input from audio input jack only when a external button is pressed and again it should switch to its default state( i.e., audio output). So, how an external button can be used(connected to device) to control the audio input in this evm ?

Thanks & Regards

Venaktesh R.