Audio Fetching headset sound input on android

Hi guys,

I need sound input on a samsung s5e android tablet with a protection (would be handled by kids/toddlers), the tablet do not have a audio jack so I am trying to get the sound via a usb-to-jack adaptator, and using a lapel microphone in a way allowing everything to fit in the protection.
The issue is Unity don't recognize it as a microphone, so it won't be listed in "Microphone.devices". I assume it is considered as an headset which is a different flow. I've seen it could the single jack could also mute the tablet sound output.
Do someone know how can I fetch the lapel microphone sound input from a unity c# script ? Is there a way to not mute the tablet sound output with a single jack plugged in the usb-to-jack adaptor ? Any advice on the subject ? Maybe you've done something similar ?

 

Found out the usb-c adaptator have to be plugged the "right-side" ...