Allow keyboard input to adjust audio levels for a clip
Final Cut and Avid both allow a quick keyboard adjustment of levels for a selected clip – eg +4 or -6, rather than just limiting to +/- 1
On final cut I have this set as alt-L and it allows a very rapid first rough audio mix
In premiere, it's possible to use keyboard input for Gain, but not for clip mixer levels.
Actually 4 keyboard shortcuts for it...
Maybe a better way to address this and satisfy the most users, is to add to the "audio gain" window a "clip volume" field. Make it separated by a divider, to show it's a different type of control.
Since that window remember the last chosen option, the OP could map it e.g. to F16, punch in the desired change amount and go... This would complement the other volume adjustment shortcuts.
Jim Simon commented
There are two keyboard shortcuts for changing Clip Volume in small and large amounts.