I have an arrangement which has some vocal parts in it. I wish to add reverb to them. When I do so, and then hit the "Apply" button, The arrangement starts to play as the reverb is being added to the arrangement, but it sounds very strange. The parts are not synced up. After a few moments of hearing this jumbled up playback, It applys the reverb to all the parts that I had selected, but it alters the position of those parts in the arrangement. It seems to slip them all a tiny bit to the left, meaning that when the arrangement is played back, the vocal parts are no longer in sync with the rest of the music and actually start to play a moment before they should. I don't understand what is happening.
I am running Music Maker 16 premium, with Windows 7 operating system. I have 8gb of ram, and 2ghz processor.