sightreader
/ˈsaɪtˌridər/
noun
- A person who can read and perform music, text, or other material at first sight without prior practice.
- The choir director was looking for good sightreaders for the new season.
- He became a skilled sightreader after years of practice with new music.
- As an experienced sightreader, she could play any piece put in front of her.