A person who sings in or specializes in singing chorales, or someone who studies or performs chorale music.
From chorale + -ist (suffix for a person who practices or specializes in something), indicating a chorale singer or expert.
A choralist is usually a trained vocalist who understands the harmonic complexity of chorale singing—it's harder than it sounds because you're carrying one line through intricate four-part harmony, making it like vocal Tetris.
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