noun
Refers to a person who arranges a piece of music, often for a different instrumentation or style.
彼は有名な編曲者として知られている。
He is known as a famous arranger.
この曲の編曲者は誰ですか。
Who is the arranger of this piece?
編曲 is the act or result of arranging music; 編曲者 is the person who does it.
Compound of 編曲 (arrangement) + 者 (person).