I'm assuming you're thinkin' the backbeat = beats 2 & 4 in 4/4?
I know certain backbeat/Funk/R&B drummers will shift or
displace where they put the snare. They may move the snare just forward(
a of 1,
a of 3) &/or just behind(
e of 2,
e of 4) where you'd think it 'normally' falls...this + the rest of the band playing 'normally' gives the illusion of tension("playing against"?).
Another way is playing in 1/2 time...you may hear certain drum parts where the snare is hitting on "3"...try counting slower(in 1/2 time)& you may be surprised to find the snare is still on "2" & "4".
Try hearing a ride cymbal in yer head goin' /1-2-3-4/1-2-3-4/ etc with a snare on the "2" & "4". Then attempt hearing the same ride pattern but with the snare ONLY on "3"...feel different?
A bassist can do the same thing(can play in 1/2 time or doubletime vs. the group's 'normal' time).
A displacement exercise-
For Ss & Gs, play one of your favorite 1-bar figures...now attempt playing the same figure BUT begin the figure on, say, the
& of 1. This shifts "your 1" to everyone else's "& of 1". If you want a specific example, e-mail me...hope ya have a drum machine.
Also, a bassist might play 'off' by thinking in a different timeline.
4/4(w/ 1/16th note subdivisons)-
/1e&a
2e&a3e&a
4e&a/
6/8-
/1&2&
3&4&5&6&/
1&2&3&4&
5&6&/ etc
Doin' this puts makes your phrasing 'different' &, possibly, pits you
against the 'normal' 2 & 4.
Basically, it's polyrhythmic.
Some good exercises, IMO, are tapping out 4/4 in one hand vs. tapping out 3/4, 5/4, 6/4, 7/4 with the other hand. Both hands should tap together on the ONE...meaning each bar in itself is complete, no
crossing the bar as in the above 4/4 vs. 6/8 example.
...I'm rambiln', sorry & I've probably cofused you even more.
Where's Ed, Dave, & Chris when ya need 'em?!