For clarification, here is how I have each bin item set up.

Each folder has the same sound effect but with a slightly different pitch (yes I know having spaces in file names is sacrilegious lol). When I use "Select All Matching" (which is a default Premiere Pro command, for clarification sake), it selects all of the same project item in the timeline, but since all of these are different project items, it's unable to select all the items in the timeline even though they were added from the same Quiver bin.


Also for clarification, what I meant by adjust audio gain was using this feature which is accessed by pressing "G" by default Premiere shortcut or right clicking on an audio clip in timeline > Audio Gain...

As for the request, yes, I am talking about a command that will select all items on a timeline that were added from a specific Quiver bin. As for the workaround, I didn't know that "select label group" existed, so I'll try experimenting with that now. Thanks!