"Most folks who do this (composers), say; "I don't really know,,, it just comes to me."
It seems some are simply chosen for a purpose! Meditating to acheive something can lead to a lot of disappointment and frustration.
Having said that, I don't see anything wrong with mediatating as long as there's no egotistical motive behind it, like wanting to be a great artist, just for the sake of being famous and there are many celebs on that path with no real talent! Faust is an extreme example of someone who sacrificed his soul for worldly recognition!
Therefore, meditate! I personally meditate in my own way!