Hi , I'm new to kdelive.
When I loaded mts file to the TL and play it, I noticed a ~3db difference on the meters

Nothing was added , just load and play.
*Not just mts even a wav file.
** update, when I play -12db tone file the meters show ~-15 ( On my VMS16P meters show correct -12db) but same on track and master.
Thank you.

there is an open issue about levels.. https://invent.kde.org/multimedia/kdenlive/-/issues/798
can you "append" more infos about the issue directly on the linked bug report?