The music plays at 120 quarter notes per minute. If this were a computer game, this would be the “Insanity” setting. Especially with Salsa.
When moving up to this speed, we recommend lowering the difficulty level to 2, or even to 1. Once things get this fast, you may find yourself overwhelmed, so going back to basics might be a good idea.
Speed 4 is only available in the paid versions of the apps.