Okay let me give it a shot.... If you count the Hi-Hat one two three four...
One Drop Roots Reggae: Bass Drum and Snare Drum on 3.
Early Dancehall: Bass Drum on 1 (and 3) - Snare Drum on 3 (plus possible Bass Drum variations).
Then came that new style that later became Ragga I guess. Check Barrington Levy "Here I come/Broader than Broadway" where the beat changes back and forth (through the mixing) from Early Dancehall to what later became some kinda "early Ragga type of beat".
Early 90s (Ninjaman/Cutty Ranks) Dancehall often had said new style:
Bass Drum on 1 and 2,5 - Snare Drum on 4. That's kinda what Courtney meant earlier in this thread I think. Not 100% sure about the second kick being exactly on 2 and a half though.
This kinda was the formula for that "classic" Late 90s Dancehall/Ragga Beenie Man Sim Simma, Red Rat, Sean Paul...
2014 Dancehall though... I don't know if it has a specific formula, I think it doesn't. The son of Freddie McGregor (Stephan) was the lead riddim-maker of the last couple of years I guess, he somewhat changed the style again imho. Very hard to define a typical 2014 Dancehall beat.
If I would have to produce a new school Dancehall beat I would use Late 90s Riddims as a formula and start from there. A lot of people I know would actually love it if Dancehall beats were like that again. This post is too long, I know
