Orchestra to Piano: Piano arrangement system based on composers’ arrangement processes

Our goal is to construct an automatic musical arrangement system by applying analysis results of composers’ arrangement processes. We arranged an orchestral score for a solo pianist to evaluate our system. Usually, an orchestral score has several instrumental parts, which is difficult for a soloist to play. Therefore, an orchestral score needs to be arranged with several instrumental parts into both hands parts, which enables a solo pianist to play with both hands. However, there is a problem with an arrangement of more than five notes for each hand, since one hand has only five fingers. To solve this problem, we introduce a protocol analysis for analyzing the process of arranging music. We applied this protocol analysis to a musical arrangement, and analyzed the arrangement process. By using the analysis results, we constructed a piano arrangement system for warning the composer of problems in the score that need to be arranged.

We constructed a piano arrangement system by applying protocol analysis of composers’ arrangement process. In the think-aloud protocol analysis, we recorded the composers thinking-aloud and visual points, and we determined nine problems and six operations in the arrangement process. Using the result of the analysis, we constructed a piano arrangement system. There are exactly same points that a musician arranged and system warned, and musical novice enable to choose from several arrangement processes.

▲Figure1: Recording of Musical Arrangement System

o2p_2▲Figure2: State-Transition Model


o2p_3▲Figure3: Overview of Piano Arrangement System


  • Sho Onuma, Masatoshi Hamanaka: PIANO ARRANGEMENT SYSTEM BASED ON COMPOSERS’ ARRANGEMENT PROCESSES, Proceeding of International Computer Music Conference 2010, pp.191-194, 2010. [PDF]
  • 中 野倫靖, 大沼翔, 金泰憲, 黒沢佳史, 斉藤優理, 斎藤佳紀, 奥村健太, 田中駿二, 浜中雅俊, 帆足啓一郎, 森山剛, 吉田周平, 吉谷幹人, 安藤大地: “デモンストレーション:音楽情報処理の研究紹介IX”, 情報処理学会 音楽情報科学研究会 研究報告 MUS86-21, July 2010. [PDF]
  • 大沼翔, 浜中雅俊: “編曲作業の時系列分析‐オーケストラ譜からピアノ譜への変換”, 情報処理学会全国大会, 09-IPSJ-71-2, pp.2.227-2.228, March 2009.