Reed (mouthpiece) a mandrel for bassoon reeds. Bassoon reeds are wrapped with nylon thread or cotton thread, depending on the musician's preference. Oboe reeds are most commonly tied with nylon thread. Finishing both bassoon and oboe reeds requires the reed-maker to scrape along the cane section of the reed with a scraping knife to specific dimensions and lengths depending on the reed style and the musician's preference. Bassoon and oboe reeds are finished when the reeds play in tune or can make a sufficient "crow"-like noise. Quadruple reed instruments have four reeds, two on top and two on bottom. Examples of this
Oboe Concerto (Bellini) only nine bars long and in the key of G major. It does not develop any melodic material in the rest of the piece, and it consists of a chord progression that makes heavy use of chromatic intervals. Naxos Records referred to it as "the shortest of dramatic introductions". Charles-David Lehrer opined that the concerto "deleted the first movement structure", in contrast to previous concerti for the oboe. Lehrer also stated that most pieces without an extensive first movement were labeled as concertinos. The second section, "Larghetto Cantabile", marks the first entrance of the oboe and transitions to E-flat major,