make audio gain adjustment an effect

Here are a few ways you can adjust audio gain more efficiently:

1. You can apply gain adjustments directly in the Project panel, so you don't have to keep adjusting them in the Timeline each time.
2. You can also select multiple clips in either the Project panel or Timeline and set the gain for all of them at once.
3. The Normalize option in the Audio Gain window allows you to raise all the clips to a specific peak level, rather than adjusting them all by a set amount.
4. My recommended workflow is to use Auto Match in the Essential Sound panel, which will match all selected clips to a standard "loudness." Loudness is more accurate than peak levels as it averages peaks over time, and these adjustments will automatically apply to the gain. Here’s more information.
5. I reserve Volume for minor tweaks and keyframing, such as raising the levels by 3-6 dB within a clip.

Thank you Paul (and thanks to Neil for including you in the conversation).    Generally I just use the audio level controls in Premiere but if there is not sufficient ability to make the audio loud enough I use the "add gain" feature...  I try and add sufficient gain so that I can tweak the levels with the audio level controls.  If it was an effect, I could copy and paste to multiple clips easily...  not to mention deleting the gain for multiple clips using the remove attributes...  It's possible I'm missing something here (wouldn't be the first time).    

Richard, thanks for your suggestion.  Will this work as well as the audio gain dialog...  

I'm working on a 2 person conversation 3 camera shoot now (I wasn't on the shoot unfortunately) and there was a problem with the lav on one of the people so I have to consistently apply a gain to one of the people.  Fortunately, he doesn't talk alot...  I can make the audio gain workflow work, just not as simple as it should be. 

I've seen tutorials where people actually use the audio gain to match levels rather than adjusting audio levels.  Doesn't make a lot of sense to me... But again, maybe I'm missing something.

Thanks as always to everyone here and the Adobe team...

You could use the 'Amplify effect.

Could you describe how you're using Audio Gain in your workflow and what specifically feels cumbersome about it?

@PaulMurphy has the best help for that sort of fast & reliable workflow audio stuff. So hopefully he'll opine here.