Why the playing audio will be recorded into the mic?

[赵成义]

Hi guys,

>>When the Ubuntu system plays audio, the volume is set to above 90%, 
>>and there is no external playback. The audio will not be collected 
>>by the mic, but the played audio will be recorded into the mic. Why? 
>>I can confirm that loopback is set to false state.

>Hello, maybe have a look at https://gitlab.com/mikhailnov/pulsejoin 
I mean I don't need to record played audio, but it is recored into the mic.
I can confirm that ALSA loopback is set to false state, and the sink monitor
is not used.


I think this issue exists in all linux systems that use ALSA. 
Has anyone found this problem before?


Thanks,


Chengyi
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