New links found between musical training and cognitive ability
Before this gets sensationalized more than it has, let’s consider that cognitive ability also plays a heavy roll in learning to play music. There may be some net synergistic effect music playing has on other cognitive function but the brain is also effected heavily when listening to music. I suspect there is not a link between musical training and cognitive  abilities but they are the result of having a brain that can function well in whatever it does.