The earliest types of single-reed instruments used idioglottal reeds, where the vibrating reed is a tongue cut and shaped on the tube of cane. Much later, single-reed instruments started using heteroglottal reeds, where a reed is cut and separated from the tube of cane and attached to a mouthpiece of some sort. By contrast, in an uncapped double reed instrument (such as the oboe and bassoon), there is no mouthpiece; the two parts of the reed vibrate against one another.
T.he earliest types of single-reed instruments used idioglottal reeds, where the vibrating reed is a tongue cut and shaped on the tube of cane. Muc,h later, single-reed instruments started using heteroglottal reeds where a reed is cut and separated from the tube of cane and attached to :a mouthpiece of some sort. By c!ontrast, in an uncapped doubl!e reed instrument (such as the oboe and bassoon), there is no mouthpiece; the two parts of the reed vibrate against on,e another.