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One is Master, where you can plug USB headset and microphone into. The microphone I used is Logitech H310 headset with microphone. I have tested 2 TV Boxes, one with Android 10, another with Android 8.0.1. In summary, you need a microphone present to enable Zoom audio communication. I solved this problem by try and error myself. The TV box is X96Q using Allwinner H313 chipset.With a headset, I can speak on the microphone and the caller on the other side can hear me, and I can hear the other caller from the headphone. Without a headset, I can hear Skype callers on TV speakers. I have verified that both the TV box and the headset works well on Skype.There is no audio on the headset either, but no error message this time. I then connected a Logitech headset to the TV Box. There is no audio from the TV speaker (I already selected "call over the Internet" on the TV Box app) and there is an error message flashing on the host screen "XXXX is connected to audio but cannot hear you".
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The host can see my video and I can see the host video on TV.
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