Here is a great summary of the recent research into Einstein’s brain
– see especially c. 1.45!
“As a little girl, I fell in love with Albert because he played Mozart so beautifully on the violin….Music helps him when he is thinking about his theories.”
– Elsa, Einstein’s wife
And the original research: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2704009/