I have to record a voice over and make them sound like a football commentator...
Can anyone recommend any tips & tricks to emulate the lip mics they use?
It's short notice so we'll be recording on a U87...
Well... first things first: you have to mimic a football comentator of course. Maybe watch a couple of matches and see how their voices change, depending on the situation of the match. You'll notice that a lot of them have a very simmilar way of expressing excitement, tension and so on.
Sendondly: From a sound engineering view, the right mic does a lot to your voice. Now for fat, colored recordings, I would generally suggest a tube mic. Now there are other classics like the shure sm7b. Your U87 isn't a bad choice. It's just much more linear and will require a little more post production.
Finally: The post is always important, when it comes to sound design. Comentators are usually boosted in bass and sub bass frequencies (50 - 200 Hz) at around 3 to 6 dB, depending on the recording. The tube or the sm7b would have a similar effect, but this is a good way to make a voice "fat". If you have a higher voice, don't just shift the boost towards your frequency spectrum, but try to open up the Q in order to still be able to catch some of that bass. Oh and naturally: lowcut at 20Hz to reduce wabbly noises. If your Voice is still "too weak", then try to boost frequencies at around 6-13 kHz for about 2 dB. Naturally, you are gonna want to compress the **** out of the voice to kill as much dynamic as you can.
Good luck!!! :)