Siamese Classical Music Volume 5: The Mahori Orchestra

Mahori (Thai: มโหรี; comparable to Khmer mohaori) is a courtly Thai classical ensemble for secular entertainment that blends the bright, percussive xylophones and gong-chime circles of the piphat (and its Khmer counterpart, pinpeat) with the supple strings and flute of the khrueang sai ensemble. In practice, a mahori set features heterophonic interplay: ranat (xylophones), khong wong (gong-circles), and time-marking hand cymbals (ching) interlock with the lyrical saw duang and saw u fiddles, the plucked zither (jakhe), and the khlui bamboo flute. Traditionally lighter and more intimate than a full piphat, mahori was favored in palatial salons and aristocratic settings. Three broad ensemble sizes are recognized: Mahori Khrueang Lek (small), Mahori Khrueang Khu (medium, or “paired”), and Mahori Khrueang Yai (large). Each tier adjusts instrumentation density while preserving the signature blend of piphat/Pinpeat percussion with khrueang sai strings.

Thai classical is the courtly and theatrical art music of Thailand, crystallizing in the Sukhothai and Ayutthaya kingdoms and flourishing in Bangkok’s Rattanakosin era. It is performed by standardized ensembles (piphat, khruang sai, and mahori) that accompany classical dance-drama (khon, lakhon), rituals, and concerts. The music features a seven-tone, roughly equidistant heptatonic tuning, heterophonic textures (each instrument elaborating the same core melody at different densities), and cyclic rhythms articulated by small cymbals (ching) and drums (taphon, klawng). Signature timbres include the pi nai (quadruple-reed oboe), wooden xylophones (ranat ek/thum), gong-circles (khong wong yai/lek), spike fiddles (saw duang, saw u, saw sam sai), the hammered dulcimer (khim), the zither (jakhe), and flutes (khlui). Repertoire consists of named pieces and suites (thao) performed at three structural tempo levels (sam chan → song chan → chan diao), moving from expansive elaboration toward concise, driving climaxes.