noun (n)

• a musician who adapts a composition for particular voices or instruments or for another style of performance(noun.person)

  Synonym:
  arranger, transcriber
  

  source: wordnet30
• device that enables something to be used in a way different from that for which it was intended or makes different pieces of apparatus compatible(noun.artifact)

  Synonym:
  adaptor
  

  source: wordnet30
• One who adapts.(noun)

  source: webster1913