Brief

You can’t mirror screen and sound together so we’ll use two different tools to do the job. This method can be done on Linux & Windows but I am using Linux (Debian) in this case.

Tools

Scrcpy - for screen mirror

sndcpy - for sound

Install

Scrcpy:

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sudo apt install scrcpy -y 

Sndcpy: download the latest release and extract the files

Mirror

Screen with Scrcpy

First, go to your device settings and enable developer mode then, connect your Android device to your computer with your charger.

Run Scrcpy on your computer terminal

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Scrcpy

you should see your phone screen on another window like this

Sound with Sndcpy

Run the linux file from the extracted files

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./sndcpy

Now you can play anything to check everything.

Recommendation

I use Scrcpy with some switches like:

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Scrcpy --turn-screen-off --stay-awake

You can see more on their Github page @ Scrcpy

& while using Sndcpy, just reduce the volume to 0% on the phone so you don’t hear “echo”

that’s it ✌🏽