Simplify the following text for a Grade 9 native English-speaking person.
Original: Some of his most famous albums are Art Pepper Meets the Rhythm Section , The Aladdin Recordings ( three volumes ) , Art Pepper + Eleven - Modern Jazz Classics , Gettin ' Together , and Smack Up .
Simplified: Some of Pepper 's most famous albums from the 1950s are Art Pepper Meets the Rhythm Section , Art Pepper + Eleven - Modern Jazz Classics , Gettin ' Together , and Smack Up .