Keiichiro Shibuya - ANDROID OPERA TOKYOーOverture: Who owns this music?

OvertureーWho owns this music? /「この音楽は誰のものか？」
Composition: Artificial Intelligence, Keiichiro Shibuya
AI Composition Program: Takashi Ikegami, Keiichiro Shibuya

ANDROID OPERA MIRRORの東京凱旋公演にあたり、AIによる作曲技法を用いた「この音楽は誰のものか？」という序曲を追加、世界初演。
複雑系や人工生命研究における世界的な科学者である池上高志氏と開発したAI、GPTによる作曲プログラムの最初のプロトタイプとなる。
GPTによって生成されたオーケストラの巨大な音群を渋谷が加工、編集、組み合わせることによって作られている。大まかな強弱はスコア上で指定されているが、演奏のフレージングはオーケストラの演奏者各自に委ねられている。つまり、GPTによるプログラム、作曲家、演奏家のそれぞれが最終的なアウトプットに介入していることが「この音楽は誰ものか？」というタイトルの意図である。

A new overture titled “Who owns this music?” has been added for the Tokyo return performance of ANDROID OPERA MIRROR, marking its world premiere. This piece employs AI-based composition techniques and serves as the first prototype of a composition program developed using GPT in collaboration with Takashi Ikegami, a globally renowned scientist in complex systems and artificial life research.
The orchestral sound masses generated by GPT are processed, edited, and combined by Shibuya. While the score provides general dynamics, the phrasing of the performance is left to the discretion of the individual orchestra players. This interplay—between the GPT-driven program, the composer, and the performers—encapsulates the intent behind the title “Who owns this music?”


[CAST]
Android Opera TOKYO Orchestra
1st ViolinTatsuki Narita, Chiharu Taki, Saori Nakazawa, Žydrė, Kyoka Misawa, Gen Iwaya
2nd Violin: Mayuko Ishigami, Junya Makino, Rintaro Kikuno, Seira Jono, Tetsutaro Nakatani
Viola: Meguna Naka, Kei Sakoda, Ai Takayama, Taiki Suzumura
Cello: Ayano Kamimura, Kotaro Kobayashi, Mano Shimojima
Double bass: Yuta Kato, Takahiro Yamada
Harp: Sakura Yoshida
Flute: Kei Sakamoto, Kanako Hatakeyama
Oboe: Takayuki Mogami
Clarinet: István Kohán, Kaori Tanaka
Bass Clarinet: Hidehito Naka
Basson: Norihito Yamamoto
Alto Saxophone: Shiro Hatae
Horn: Akane Tani, Natsumi Yoshizawa
Trumpet: Shutoku Sato, Ayako Minowa
Trombone: Kousei Murata
Bass Trombone: Kazunari Ozeki
Tuba: Hina Watabe
Percussion: Mitsunori Kambe, Bylkova Iryna, Shingo Takase, Ririko Saito

Alter4

[STAFF]
Android Programming: Shintaro Imai

Sound Design & Staff
Tetsuya Yamamoto, Kaori Yamaguchi, Yuki Suzuki, Tsukasa Matsumura
Kantaro, Kobayashi, Kazuaki Kondo, Yusuke Marubayashi,
Yu Kudo, Ryohei Ikeda, Shunya Nakajima, Chihaya Ito, Hayato Seimiya

Light Design & Staff
Go Ueda, Arisa Nagasaka, Masato Shida, Natsuki Kawamura,
Keiji Oba, Misako Imai, Miho Sato, Ayumi Kanno

Orchestra Staff
Orchestra Rehearsal Conductor: Masakazu Natsuda
Score Production Assistant: Hiroto Kikukawa, Yoko Nishimura
Piano Tuning: Megumi Omamiuda
Orchestra Stage Manager: Takashi Nemoto
Stage Manager
So Ozaki, Kazuya Kushimoto

Sound and Video Technical Director: Yuki Suzuki

Production Staff: Natsumi Matsumoto
Shigeru Ogawa, Miki Omukai, Ayako Okura,
Sota Kawagoshi, Kento Tanaka,
Takumi Morimoto, Mai Mino, April Wei-West

[FILM]
Recording: Yujiro Yonetsu, Rinko Fujita, Kazuhiko Misumi, Ren Iizuka
Mix: Yujiro Yonetsu
Film Director: Hideaki Fujimae

[CREDIT]
Organizer: ATAK TOKYO CO, LTD.
Co-organizer: Osaka University of Arts
Cooperation: TV Asahi
Special Android Cooperation: Department of Art Science, Osaka University of Arts
Production Cooperation: Communication Design Center, Dentsu Lab Tokyo, Flex Co., Ltd.
Planning, Production, and Management: ATAK TOKYO CO, LTD.
Special Sponsorship: PwC Consulting LLC
Sponsorship: POLA Inc., Sowa Delight Inc.
Supported by Arts Council Tokyo, Tokyo Metropolitan Foundation for History and Culture