Volume Settings for each source

Function ROSE OS
#1

I own an RS520.
Settings > Audio Settings > Volume Settings for each source.
There are two settings for Tidal :
Tidal MV
Tidal.
Increasing the Tidal setting ftom -5db to 0db
increases the Tidal volume ( which is what I want ).
However, increasing Tidal MV from -5db to 0db appears to have zero effect. What is the purpose of Tidal MV ?

#2

@Martini

Tidal MV stands for Tidal Video.

Thank you

#3

Thank you @ Rosehan. I appreciate your quick reply.
I can relax now !