Which hand you use to play makes a difference in the sound. Sidy showed us this last night.
"Listen" he said. "when you play the bass with the left hand, it sounds different than when you play it with the right."
He demonstrated and, amazingly, I could hear the difference.
And the extra beat in one of the Dansa rhythms. That is so the dancer has time to shift from one arm to the other.
These are things you can't learn from a book or cd. These are things you might not be able to learn from an American teacher, even. This is why I am so grateful to have found my teacher.