The Bassoon
Two reeds tied together are commonly known as a double reed. This double reed fits into a tube at the top of the instrument and vibrates when air is forced between the two reeds.
Like the Oboe, the Bassoon is a double reed instrument but with a lower sound. It is the Bass instrument of the Woodwind family. Its double reed is attached to a small curved tube called a bocal which fits into the bassoon. When the player blows air between the reeds, the vibrating column of air inside the instrument travels over nine feet to the bottom of the instrument, then up to the top where the sound comes out.
Below is a video of "Lambada" played on 2 Bassoons.
Although the Bassoon usually plays low notes when playing with other instruments, some composers like to experiment and try unusual sounds. In one of the most famous Bassoon solos ever, the opening of Stravinsky's "Rite of Spring", the instrument plays quite high.
Here are 2 short excerpts of the Bassoon playing lower notes as usually expected. Peter and the Wolf and The Sorcerer's Apprentice.