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 da caccia, Baroque antecedents of the cor anglais. Even less common is the bass oboe (also called baritone oboe), which sounds one octave lower than the oboe. Delius and Holst both scored for the instrument. Similar to the bass oboe is the more powerful heckelphone, which has a wider bore and larger tone than the baritone oboe. Only 165 heckelphones have ever been made. Not surprisingly, competent heckelphone players are difficult to find due to the extreme rarity of this particular instrument. The least common of all are the musette (also called oboe musette or piccolo oboe), the sopranino member