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The piri is a Korean double reed instrument, used in both the folk and classical (court) music of Korea. It is made of bamboo. Its large reed and cylindrical bore gives it a sound mellower than that of many other types of oboe.
There are four types of piri:
- Hyang piri (hangul: 향피리; hanja: 鄕--)
- Se piri (hangul: 세피리; hanja: 細--)
- Dang piri (hangul: 당피리; hanja: 唐--)
- Dae piri (대피리)
There are different types of piris because each is suited for a different type of music and use. The Hyang piri is the longest and most common out of all piris.  Because of its loud and nasal tone, it usually plays the main melody in an ensemble.  The se piri is the smaller, thinner, and much quieter one. Additionally, because of its quiet tone, it is used along with voices or soft stringed instruments.  The Dang/Tang piri is wider and is similar to the Chinese guanzi instrument. Additionally, the dae piri is a modernized piri, with keys and a bell, looking much more like a western oboe. 
Piri is thought to have been introduced to Korea from a country bordering west of China before Goguryeo period. According to the Book of Sui, piri was also known as gagwan (가관; 笳管), and it originates from Kucha. During the reign of King Yejong of Goryeo dynasty, another double-reed cylindrical instrument was imported from Song dynasty China, and to disambiguate, the former was named hyang piri and the latter dang piri. Se piri is smaller than hyang piri but has the same structure and range. Se piri appears to be invented much later than hyang piri.
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