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 (Marcello) as the intended instrument for the arrangement, originated after Johann Bernhard's, but may have been copied from an earlier stage of Bach's arrangement. Another manuscript containing Bach's arrangement of Marcello's oboe concerto indicated "J. S. B." as composer on the title page, without mentioning an earlier model, or its composer, for the composition. The ornamentation as indicated in Bach's keyboard version of the concerto works well on harpsichord, but is less suitable for performance on an early 18th-century oboe. Nonetheless Bach's ornamentation has been used for 20th-century publications of the oboe concerto – the ornamentation causes fewer problems when performed