If your vocal is on a track in RB, then the audio edit window in RB has a db scale on the left side.If you use the arrows on the bottom or left of the audio edit window, you can scroll through the track and check the overall level of the vocal.

If you determine it needs a volume boost, highlight the whole track, go to Edit - Audio Effects - Gain Change then boost it the required dbs - this may not solve your initial problem but it will allow you to bring your vocal audio up.

Cheers - Ian


Ian
My "Original Tunes" Site
My gene pool needs more chlorine.