| 作曲者 | Elliott Carter (1908-2012) |
| タイトル | Esprit rude/Esprit doux I |
| サブタイトル | Rough Breathing/Smooth Breathing |
| 出版社 | Boosey & Hawkes（ブージー＆ホークス） |
| 楽器編成 | flute and clarinet |
| 品番 | 9790051102518 |
| 形状 | 12 ページ・Saddle stitching |
| 作曲年 | 1984年 |
| 出版番号 | BH 3000218 |
| ISMN | 979-0051102518 |
Esprit Rude/Esprit Doux for flute and clarinet was composed for the celebration of Pierre Boulez's 60th birthday on March 31, 1985 in Baden-Baden. The title, translated as rough breathing/smooth breathing, refers to the pronunciation of classical Greek words beginning with a vowel or an “R”. With “Esprit Rude” (rough breathing) the initial vowel (or R) is to be preceded by a sounded H, and is indicated by a reversed comma above the letter. With Esprit Doux (smooth breathing) the initial vowel is not to be preceded by H and is indicated by a comma above the vowel. In the Greek for sixtieth year (transliterated as hexèkoston etos) the initial epsilon of the first word has a rough breathing sign while the epsilon of the second has a smooth one.