Impossible to completely mute audio output on Android

Hi,

I would like to be able to stream video to a jitsi meeting from my mobile phone at the same time as my computer. I can then choose whether the participants see my phone video or the computer video, and I want to use the computer exclusively for the sound.

I am able to mute the microphone of the phone, but I cannot mute the audio output as jitsi seems to prevent the volume from going below a certain level. This means the computer picks up the audio from the phone generating feedback.

Any ideas folks?

Peter