| 作曲者 | P.D.Q. Bach (1807-1742) |
| タイトル | Knock, Knock |
| サブタイトル | Choral Cantata |
| 出版社 | Theodore Presser・プレッサー |
| 楽器編成 | 混声合唱 |
| 楽器編成（詳細） | Harpsichord, Flute 1, Flute 2, Flute 3, Contrabass, Alto, Alto, Bass, Bass, Baritone, Tenor, Tenor, Soprano, Soprano |
| 品番 | HLTHE41241073 |
| 校訂者 | Prof. Peter Schickele |
| 形状 | 36 ページ・20 g |
| 演奏時間 | 14:00 |
| 出版年 | 1992年 |
| 出版番号 | 412-41073 |
This choral cantata is a setting of a number of jokes in different genres, including the one about the amorous porpoises, baby seagulls and staid lion.
I. Recitative and Chorus: "Knock, knock"
II. Recitative and Chorus: "How many psychiatrists"
III. Recitative and Chorale: "What is the question"
IV. Recitative and Chorus: "So this guy"