Ever since I start spending a lot of time writing Real Music(tm) in PyDAW,
one of the biggest annoyances of being non-linear-pattern-based-freeform is
that the audio items could not easily all have their volume adjusted across
regions...  (in linear DAWs, they would typically all exist on the same
audio track and could be adjusted together).

To circumvent the issue, add a context menu action to set volume for all
instances of a file from a single dialog...