The bassoon quartet has also gained favor in recent times. The bassoon's wide range and variety of tone colors make it well suited to grouping in a like-instrument ensemble. Peter Schickele's "Last Tango in Bayreuth" (after themes from "Tristan und Isolde") is a popular work; Schickele's fictional alter ego P. D. Q. Bach exploits the more humorous aspects with his quartet "Lip My Reeds", which at one point calls for players to perform on the reed alone. It also calls for a low A at the very end of the prelude section in the fourth bassoon part. It is written so that the first bassoon does not play; instead, the player's role is to place an extension in the bell of the fourth bassoon so that the note can be played.