double reeds.
Double reeds are used on many instruments, such as the
oboe,
oboe d'amore,
English horn,
bass oboe,
heckelphone,
bassoon,
contrabassoon,
sarrusophone,
shawm,
bagpipes,
nadaswaram and
shehnai and
others. The two reeds vibrate against each other and not against a mouthpiece. In the case of the
crumhorn,
bagpipes, and
Rauschpfeife, a reed cap encloses the reeds, and the reeds do not contact the player's mouth.
Manufacturing Double reed manufacturing begins the same way as that of single reeds.
Arundo donax cane is collected, dried, processed, cut to manageable sizes, and separated into various diameters. The most common diameters for American-style oboe reeds are: , , and . Many American oboists prefer one diameter at one time of the year and a different diameter at other times. The tubes are split into three equal parts and the pieces that are not warped are chosen. A reed made from warped cane will not
vibrate consistently on both sides. The split pieces are gouged by machine to remove many layers and drastically decrease thickness, which eases the scraping process for the reed-maker. Finally, the gouged pieces of cane are soaked, shaped on a shaper with razor blades, and allowed to dry before the final steps. The shaped piece of cane is then re-soaked and tied onto a "staple" for
oboe reeds or formed on a mandrel for
bassoon reeds. Double reeds are tied in place with 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 reeds==