Originally Posted by anstahc
Volume will be even but it will be perceived louder on the side that arrives first. Also, any delay times less than 20 ms will sound awful in mono.
That's not true. I been doing that for years since the Pro Tools Mix + days. That's an old trick w/ Digi Short Delay. It's a true stereo delay adjustable on both sides. One side doesn't dip lower than the other. You can do it with stereo synths as well. 20ms is some times way too far for what you are trying to be done. You don't want your background vocals spread further than any music/perc you may have spread. I do cymbals a little more drastic at 30-35ms. When using digi short delay one side will not be perceived louder/lower because it's not. Just wider.
Now if you try it with Waves H Delay you have to bring up the delayed side +5 on the output. But you also have to split the stereo into mono if it's stereo and jump thru a whole bunch of hoops. You don't have to do that with Digi short delay.