Due to this post I again tried out the Differential 57 approach at a concert with my 4pc church band
band last night.
I put one mic just outside and 6" above my floor tom aimed over it and toward the snare.
The floor tom mic picked up both floor and snare nicely, however, I liked the sound thru the PAS when I aimed the floor mic right down at the tom about 1-1/2" from the edge of the head. Big sound! So I mic'd the snare separately, putting the mic between snare and hat aimed at me, not the floor tom.
From the video, I found that the snare was a bit loud in the mix...I probably could have gotten by not micing it at all, but better safe than sorry. I'll know next time.
Anyway Richard, usually I place the mics not aimed directly at the drum...place them kit Left and kit right aim over the tops of the drums, below the cymbals. Have also miced above the cymbals and got pretty good sound, but not a deep tom sound, mostly adds shimmer.
All in all, if you really need to mic the overhead drums, I find that a mixer works well for me. The point of the differential preset is to save on inputs and make the mixer unnecessary, but I personally prefer the flexibility of a mixer when I do mic overhead (which is rare).
I'll post some video when i get it finished so you can see.