What computer operating system is your Premiere Elements 12 running on? Do you have a specific theme in mind that I can use as an example for you?
What you are going to have to do is to go into the computer location where the theme's folders and files are stored, copy the audio file used in the theme to the computer desktop. Import the audio file into Premiere Elements where you can adjust the volume. Export it from Premiere Elements as a wav file (Publish+Share/Computer/Audio). And, then replace the original audio in the theme's folder with the volume edited .wav file in the theme's folder on the hard drive.
We will be watching for details so that we can fine tune the reply.
I am using a Windows 7 (Home Premium edition) OS with Service Pack 1; it has a 64 Bit Operating System and 6 Gb RAM
The menu theme I am using is out of the Entertainment group - Art in Motion
I will try your solution, but am a bit intimidated by the depth of the process and have been known to accidently pull wrong things out of files... I guess I'm not doing too bad for an old 61 year old, though!
I think I'll wait to get your "fine-tuned" reply.
Premiere Elements 12/12.1
Windows 7 64 bit
Movie Menu: Entertainment/(A) Art-in-Motion
Finding the theme's audio file to lower its volume
Local Disk C
and in the (A) Art-in-Motion Folder is the music file that we seek....its name is Artistic Theme Menu_bg_audio.mp3.
Right click the file, select Copy, and paste it to the computer desktop.
Changing the Artistic Theme Menu_bg_audio.mp3 volume in Premiere Elements 12/12.1 (Go with the default project preset)
Files and Folders
from Project Assets drag the music file to the Soundtrack
Select/Highlight the music file in the Soundtrack, go to Adjust Tab/Adjustments Palette/Volume Panel expanded and use the
volume slider there to adjust the music clip volume.
Then Publish+Share/Computer/Audio with Presets = MP3 - High Quality.
Replacing Original with volume adjusted one
Go back to the (A) Art-in-Motion Folder and move the original Artistic Theme Menu_bg_audio.mp3 from there to a place for
safe keeping, maybe Libraries/Music.
Then move the volume lowered Artistic Theme Menu_bg_audio.mp3 from its save location that you designated at its export
from Premiere Elements to the (A) Art-in-Motion Folder.
Make sure that the name of the music file in the (A) Art-in-Motion Folder is exactly the same before and after all this.
Note: Adobe has set the file name so that this music file applies to both the main menu and the scene menu.
Any questions or need clarification, please do not hesitate to ask.
Looking forward to your results.