if you have perfection in a product, the only evolution possible is for it to become less perfect.
People being people the best are not content with always doing the same thing, so they will experiment and move away, following other influences. The drumming may become great in other ways but not great in the way of inducing trance states the way it once way.
Just my theory on why it might be that an old recording is better for inducing trance than a newer one might be.
Your point is technically correct, but it seems a bit preposterous to say that the old drumming music was flawless perfection in introducing these sort of effects, to the point where any change would by definition be a determent. How would you know that? How would anybody know that?
yeah, I wouldn't know, but if the old recordings seem better for inducing trance and the newer not I offer an explanation why that could be without the newer generation of Haitian voodoo drummers necessarily having to be worse drummers.
In my experience with trying to meditate to rhythms it takes fifteen minutes to half an hour before you really notice a significant difference to meditation without it.
Also, "should" is not really the right word to use here - I would go with "might".
What I mean with that is that this isn't like a pill whose are chemicals will do its on their own after consumption, with or without thinking about them. It's an effect that is produced through a sensory interaction with the brain. As a result, how one consciously attends to that interaction has a huge impact on the effectiveness.
People being people the best are not content with always doing the same thing, so they will experiment and move away, following other influences. The drumming may become great in other ways but not great in the way of inducing trance states the way it once way.
Just my theory on why it might be that an old recording is better for inducing trance than a newer one might be.