Simplify the following text for a Grade 10 native English-speaking person.
Original: When Bruno Walter left Munich for New York , Knappertsbusch succeeded him as General Music Director of the Bavarian State Orchestra and the Bavarian State Opera , with a life-long contract .
Simplified: When Bruno Walter left Munich to go to New York , Knappertsbusch succeeded him as conductor of the Bavarian State Orchestra .