A double-reed woodwind is a type of musical instrument that produces sound when air is blown through two reeds that vibrate against each other. The two most common double-reed woodwinds are the OBOE and the BASSOON. The OBOE is a four-letter word and the BASSOON is a seven-letter word. Both instruments have a long, conical bore and produce a warm, mellow sound. The OBOE is a higher-pitched instrument than the BASSOON and is often used as a solo instrument in classical music. The BASSOON is a lower-pitched instrument and is often used in orchestral music.