Hi,
What you want to do is called ducking - I'm surprised MEP does not include this feature since other Magix products do. Try searching the help file for ducking and ensure it's not a feature included. If not you can always do your audio work in a program like Music Maker and then bring it into MEP and sync it with your video.
Justin

Hi,

Movie Edit Pro's audio recording function does offer the ducking that Justin mentions, but that would require that you're actually doing the voice-over recording on your system and you're willing to do it all over again, as you have obviously already performed the recording. In the future, you could try to take advantage of the ducking. (It's an advanced setting in the audio recording dialog.)

I might still be able to suggest another improvement to your workflow, which might lead to better results and just make the whole procedure easier: Instead of chopping up the audio track into separate objects and adjusting the level on each object, just use the drawing mouse mode tool to "draw" the volume curve into the audio track. This way you get maximum control over the behavior of your audio track and smoother transitions.

I hope this helps.

MEP does have a way to do what you want. Select the curve mouse tool then click, or double click, the volume line in the soundtrack near to where you want the fade to start (Don't drag the mouse or you'll get a lot of control nodes). This highlights the volume level line and creates a control node. Select the object mouse tool and click the volume line 3 more times. You can now drag the middle two nodes down to fade. You can adjust the position of the fade by dragging the nodes left or right.