Simplify the following text for a Grade 12 native English-speaking person.
Original: On June 6 , 2007 , the Austrian government announced the appointment of Welser-M Ã st as Musical Director ( Generalmusikdirektor ) of the Vienna State Opera beginning in September 2010 , alongside Dominique Meyer as director ( Staatsoperndirektor ) .
Simplified: In 2007 , the Austrian government made him Musical Director ( Generalmusikdirektor ) of the Vienna State Opera beginning in September 2010 .