Music levels change - feature request

I wish there was a feature in premiere where I could highlight all the music in the bin and type in -20 and have it change every single highlighted song to -20 db.  Because right now it's a real pain to double click every single song, go into the audio clip mixer tab and change it from 0 to -20.  Back in my Avid days, they had a feature that allowed you to change the volume levels upon import.

yes i know premiere has some feature to do this in-timeline but i dont want to do it in timeline, i want to do it in bin to affect the original raw song.

No i dont want to do it with Audio gain. I hate how it reduces the size of the waveforms. I want a way to change all the audio clips from 0 to -20 without affecting the waveform size. When I do it my way by double clicking the clip in the bin and turning down the audio in the audio clip mixer tab, i can now have the same wavelength patterns that arent reduced in size while having quieter volume levels.