Windows 11 audio output issues.

System : Dynabook Portege X40-K

OS : Windows 11

Zoom version : 6.3.6 (56144)

Zoom audio output is very, very low. I can hardly hear anything. Volume is maximized (100%) in Zoom as well as in the system. No problem with YouTube videos. Tried https://zoom.us/test also. Same results. However, in this I noticed that the output sound starts loud and clear but goes down within a second.

Googled a bit and based on what I read, I tried the following in the zoom Audio settings

   - Set signal processing by Windows audio device drivers too "off(Windows - raw)"

   - Windows system audio enhancements to "off".

Problem persists.

How to fix this?

Thanks