Hi Antoine,
Unless I am mistaken with this setting as proposed by “plays with audirvana” on dragonfly red, it is no longer possible to adjust the volume!
Best Regards.
You are right, I made a mistake for it. It should be good now.
The change is automatically done after a week but you can request it again by going in the database of Audirvāna itself. Do you have https://sqlitebrowser.org/ ont your computer?