Would like to know how to adjust audio volume in custom menu....the thing is when I add a song to be added as part of the menu it is very loud unlike when I add an mp3 to the time line and able to adjust it right on the yellow line or use the gain...but in the menu creation I do not seem to have these options for adjustments. I learned this when my project was burned to DVD and played on a set top.
You are correct. You can not change the audio level of music used as a menu background.
You will need to open your music clip in an audio program (like the free download Audacity) and set the volume levels in it.
As Steve points out, there is no Audio adjustment in the authoring portion of PrE. That is done in either an audio-editing program, or in a separate Project in PrE, to be used in your main Project.
This ARTICLE will give you tips on modifying Motion Assets (Video & Audio) for Menu Sets in PrE. Make sure that you do not exceed the max. Duration for use in a Menu Set.
As for those Assets, I would not use MP3's, and would convert those to PCM/WAV 48KHz 16-bit, when you adjust the Volume of those Clips, with a Save_As. This ARTICLE will give you a little background on MP3's. Some MP3's work fine, but others just will not.