Simplify the following text for a Grade 10 native English-speaking person.
Original: In 1945 , he led the orchestra in recording sessions of the Grand Canyon Suite by Ferde GrofÃ in Carnegie Hall ( supervised by GrofÃ ) and An American in Paris by George Gershwin in NBC 's Studio 8-H .
Simplified: In 1945 , he led the orchestra in Carnegie Hall recording sessions of American music including An American in Paris by George Gershwin .