人間の活動によって大量のプラスチックが生み出されている。それは海へと流れ、煽られ、砕かれ、マイクロプラスチックとなって半永久的に海中に蓄積される。マイクロプラスチックとは、生物物理学的環境中に存在する微小なプラスチック粒子であり、特に海洋環境において現在、極めて大きな問題(plastic pollution)になっている。
この作品は、マイクロプラスチックを用いた音響パフォーマンスであり、人間とプラスチックの関係をアルゴリズミックに示す。コントラバスの低音によって、円盤の上に載ったマイクロプラスチックが震えだし、音を響かせる。マイクロプラスチックは音と共に動き始め、やがて円盤から落ちると、その位置に応じてピアノが演奏される。ピアノの音によってマイクロプラスチックはさらに震えだして円盤から流れ落ちていき、叫ぶようにピアノが弾き鳴らされる。人間が便利な生活を追い求めた故に生まれたプラスチック。その存在が現在、様々な生態系の凶器となっている。やがてそれは私たち人間への思いがけない贈り物として返ってくる。
"Gifts from Microplastics" is electro-acoustic and media performance to give us opportunities to think of the relationship between human and environment, dealing with Plastic Pollution known as a social problem in recent years. This work discloses the connection between microplastics and humans with rule-based composition that involves interactions between microplastics and players.

A large amount of plastics are generated from human activities. They are carried to the sea, waved, and piled up permanently as microplastics. Microplastics are tiny plastic pieces that exist in human life especially into the ocean. Their existence causes the environmental issue of plastic pollution. Plastic pollution disrupts ecosystems in the sea. Fish, shellfish and seabird mis-swallow microplastics in the seawater. Microplastics can come into our stomach with the way they hide in fish and shellfish that we eat. In this work, electro-acoustic performance from piano and upright bass players are combined with environmental issues, plastic pollution.

”Gifts from Microplastics" contains two people playing the performance. One is Keisuke Tsuchiya as an upright bass player and composer. Another is Hazuki Ohta who is a pianist and activist of enlightenment for environmental issues. We went to the coast to gather up microplastics that are mixed among sand. Only microplastics can be found floating on the water including sand in a bucket due to buoyancy.

Microplastics on the disk start vibrating with the speaker when contrabass is played. They start moving with the vibrations like possession of lives, make click-clack sounds, finally fall down from the disk and are accumulated on the floor where the players are. The disk is divided into twelve and assigned a twelve-tone scale. The rule makes the piano played depending on the position of falling microplastics on the floor. The sounds of piano make microplastics more vibrated. That also makes the sounds of piano and microplastics repeatedly scream because of much more microplastics falling. Plastics are able to make our life convenient. On the other hand, they are also a threat to a variety of lives and then come back to our life as unexpected gifts.
Performance and sound installation (2020)
Composition/Contrabass: Keisuke Tsuchiya
Piano: Hazuki Ota
Accepted for NYCEMF 2020
Material: Microplastics, Aluminium disk(800mm in Diameter), 15" Woofer unit
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