Aside from the Thai, ethnic minorities such as the Lao, Lawa, Hmong, Akha, Khmer, Lisu, Karen and Lahu peoples have retained traditional musical forms.
Thai classical music is synonymous with those stylized court ensembles and repertoires that emerged in their present form within the royal centers of Central Thailand some 800 years ago.
While the three primary classical ensembles, the Piphat, Khrueang sai and Mahori differ in significant ways, they all share a basic instrumentation and theoretical approach.
"[1] Several kinds of small drums (klong) are employed in these ensembles to outline the basic rhythmic structure (natab) that is punctuated at the end by the striking of a suspended gong (mong).
Seen in its most basic formulation, the classical Thai orchestras have a very strong influence on the Cambodian (Khmer) pinpeat and mahori ensembles, and are structurally similar to other orchestras found within the widespread Southeast Asian gong-chime musical culture, such as the large gamelan ensembles of Bali and Java, which most likely have their common roots in the diffusion of Vietnamese Dong-Son bronze drums beginning in the first century.
Musicians, however, imagine these compositions and notations as generic forms which are realized in full in idiosyncratic variations and improvisations in the context of performance.
The highly decorated piphat ensemble that features the ornately carved and painted semicircular vertical gong-chime is traditionally associated with the funeral and cremation ceremonies of the Mon ethnic group.
In addition to these instruments are the khlui (vertical fipple flute) in several sizes and ranges, a goblet drum (thon-rammana) and, occasionally, a small hammered Chinese dulcimer (khim).
The khrueang sai ensemble is primarily used for instrumental indoor performances and for accompanying the Thai hoon grabok (stick-puppet theater), a genre deeply influenced by Chinese puppetry styles.
Accordingly, the addition of Chinese-sounding string instruments in the khrueang sai ensemble is imagined, by the Thai, to be a reference to the probable Chinese origins of this theater form.
The third major Thai classical ensemble is the Mahori, traditionally played by women in the courts of both Central Thailand and Cambodia.
The ensemble, which is performed in three sizes—small, medium and large—includes the three-string saw sam sai fiddle, a delicate-sounding, middle-range bowed lute with silk strings.
While Thai classical music was somewhat discouraged as being unmodern and backward looking during Thailand's aggressively nationalistic modernization policies of mid-20th century, the classical arts have benefited recently from increased governmental sponsorship and funding as well as popular interest as expressed in such films as Homrong: The Overture (2003), a popular fictionalized biography of a famous traditional xylophone (ranat ek) performer.
Many of the most popular artists have come from the central city of Suphanburi, including megastar Pumpuang Duangjan, who pioneered electronic luk thung.
The late 1990s saw a commercial resurgence of Luk Thung, and the modern electrified, pop-influenced version of the genre remains the country's most popular music form.
[4] Bhumibol's musical influences included Louis Armstrong, Sidney Bechet, Benny Carter, and Johnny Hodges.
String pop took over mainstream listeners in Thailand in the 1990s, and exponents like Christina Aguilar, Bird Thongchai McIntyre and Asanee-Wasan became best-sellers.
Simultaneously, Britpop influenced alternative rock artists like Modern Dog, Loso, Crub and Proud became popular in late 1990s.