| 作曲者 | Thomas Kessler (b. 1937) |
| タイトル | Is it? |
| サブタイトル | for soprano and soprano saxophone (clarinet in Bb) on a text by John Cage |
| 出版社 | Boosey & Hawkes・Bote & Bock（ブージー＆ホークス） |
| 楽器編成 | soprano and soprano saxophone (clarinet in Bb) |
| 品番 | 9790202534366 |
| 難易度 | 上級 |
| 言語 | 英語 |
| 形状 | 24 ページ・Ring/Spiral binding |
| 演奏時間 | 7分 |
| 作曲年 | 2002年 |
| 出版年 | 2016年 |
| 出版番号 | BBC 3436 |
| ISMN | 979-0202534366 |
| ISBN | 9783793141334 |
The seven-minute composition is based on an English text by John Cage: a quasi-musical calculated succession of 56 short basic questions about music. Singer and instrument have to perform various vocal, playing and breathing techniques, mostly in parallel motion. Their performance develops from a kind of ritual to free expression, with the piece itself becoming an answer to what the text wants to know – at least in parts: 'Is it high? Is it low? Is it loud? Is it a plane? Is it music? Why?'