Conversation so far:
What type of music did Monroe originally play?
gospel song "What Would You Give in Exchange For Your Soul?.
What type of music was Monroe known for (famous for) ?
bluegrass music.
Did he produce albums?
CANNOTANSWER.
Did he perform in any concerts?
Monroe successfully auditioned for a regular spot on the Grand Ole Opry.

Question: Did he play an instrument or sing in the Grad Ole Opry?
Self-contained rewrite: Did Bill Monroe play an instrument or sing in the Grad Ole Opry?