my example can not hear audio when i click yellow button

Unity Engine
,
1

i can run broadcast example ok. but when i click audio button, my web not play audio.

8246082--1078863--upload_2022-7-1_16-43-3.jpg
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who can tell me how to check this problem.

2

Can you check audio level on browser using chrome://webrtc-internals/ ?

and please check browser version, browser audio setting, etc…

3

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i check js code and find，VideoPlayer Sample，（right）can hear audio，but left
Multiplay Sample can not hear。and they code。
how can i add audio in left code！thank you！

4

now i can get audio in left code by add code in video-player

this.pc.addTransceiver('audio', { direction: 'recvonly' });
    this.pc.addTransceiver('video', { direction: 'recvonly' });

but i have another problem is when the second player connected，he can not hear audio.