Playing YouTube video in Stage "Output window" item is not muted

[mmpekapuran]

Before submitting

• I searched existing open and closed issues.
• I reproduced this on the latest available version.

Describe the bug

When I play Media files —such as from YouTube— I get a double audio output. This only happens when I configure the main output for the Stage display. If the Stage display is not set up for the main output, there is no sound at all.
This issue occurs only on Ubuntu 26.04; it does not happen on Windows 11, which I also use.

Steps to reproduce

Please fix it

Expected behavior

No response

Screenshots, logs, or files

No response

Operating System

Linux

FreeShow version

1.6.5

Additional context

No response