The range of the bassoon begins at B1 (the first one below the bass staff) and extends upward over three octaves, roughly to the G above the treble staff (G5). However, most writing for bassoon rarely calls for notes above C5 or D5; even Stravinsky's opening solo in "The Rite of Spring" only ascends to D5. Notes higher than this are entirely possible, but seldom written, as they are difficult to produce (often requiring specific reed design features to ensure reliability), and at any rate are quite homogeneous in timbre to the same pitches on cor anglais, which can produce them with relative ease. French bassoon has greater facility in the extreme high register, and so repertoire written for it is somewhat likelier to include very high notes, although repertoire for French system can be executed on German system without alterations and vice versa.