Pi (Thai: ปี่, pronounced [pìː]) is the generic term for any of a variety of quadruple reed oboes used in the traditional music of Thailand, piphat. It is very similar in construction and playing technique to the Cambodian sralai.
- Pi chawa (ปี่ชวา)
- Pi klang (ปี่กลาง)
- Pi mon (ปี่มอญ)
- Pi nai (ปี่ใน)
- Pi nok (ปี่นอก)
- Pi chanai (ปี่ไฉน)
- Pi nae (ปี่แน)
The pi nok is smallest among pi nok, klang, and nai. Pi noks have been played since the ancient times.
The pi nai (41–42×4.5 cm) is commonly seen in Thai literature such as Phra Aphai Mani.
Pi cha naiEdit
The pi chanai is pi song thon (ปี่สองท่อน, pi that consists of two parts). The body part is called lao pi (เลาปี่), the mouthpiece part is called "lamphong" (ลำโพง). Both parts are made from wood or ivory. It is presumed that the Thais obtained this musical influence from India due to its similarity to the Indian shehnai. Pi have been used in Thai since the Sukhothai period. At present, it is played together with the pi chawa in parades and in concerts.
The pi chawa is pi song thon (ปี่สองท่อน) (pi that consist of two parts) like the pi chanai, but longer. It is made from wood or ivory. It is presumed Thais took on introducing the pi chawa as same time as the glong khaek. From some evidence, they used pi chawa in Krabuan Phayuhayattra (กระบวนพยุหยาตรา, military march) in the pre-Ayutthaya period. The pi chawa today is used mostly during funeral rites.
A pi chum (Thai: ปี่จุม) is a musical instrument from northern Thailand. It is like an oboe.[page needed] It is found in the provinces of Chiang Mai, Chiang Rai, Lampoon and Lampang. People play a pi chum for their activity. The word "chum" in Thai means "group", so when people play a pi chum, they play as a group.
The body of the pi chum is made from bamboo. The pipe and the reed are made from copper. A pi chum has seven holes on the body that are used to set the tone of played,There are four types of pi chum that are separated by size, length and voice. The first one is the pi mae (Thai: ปี่แม่) which has a length of 70–80 cm. It is larger than other pi chums and has a bass voice. The second one is the pi krang (Thai: ปี่กลาง), which is smaller than the pi mae. It has a length of 60–65 cm. and it has a balance voice. The third one is pi koy (Thai: ปี่ก้อย), which is smaller than the pi krang but bigger than the pi tad. It has a length of 45–55 cm. The voice of the pi koy is treble. The last type is the pi tad (Thai: ปี่ตัด) or pi lek (Thai: ปี่เล็ก), which is the smallest pi chum. It has a length 35–40 cm. The voice of pi tad is treble but higher than the pi koy. A group that has all four instruments is called a ‘pi chum si’ (Thai: ปี่จุมสี่) and a group that has three instruments is called a ‘pi chum sarm’ (Thai: ปี่จุมสาม).
The pi mon is pi song thon (ปี่สองท่อน, pi that consist of two parts) like pi chawa but greater. Lao pi (เลาปี่, the body of pi) is made from wood. Lamphong (ลำโพง, the mouth of pi) is made from metal. The pi mon is played usually in the piphat mon ensemble or in the old called pi phat raman ensemble. 
- The Concise Garland Encyclopedia of World Music. Routledge. 2013-02-01. ISBN 9781136095948.
- "Pi so or pi chum". www.asza.com. Archived from the original on 2015-12-09. Retrieved 2015-11-22.
- ปี่จุม Archived 19 January 2017 at the Wayback Machine Originally accessed: 2015-11-22. (in Thai)
- ปี่ Archived 2007-01-16 at the Wayback Machine (in Thai)
- เครื่องดนตรีประเภทเครื่องเป่า ปี่ Archived 19 December 2008 at the Wayback Machine (in Thai)
- ปี่ เครื่องดนตรีไทย ประเภทเป่า Archived 2007-09-27 at the Wayback Machine (in Thai)
- เครื่องดนตรีประเภทเครื่องเป่า (in Thai)
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