Traditional Thai Instruments – Thai & Isan Music
What does a traditional Thai instrument actually sound like? A photograph can show you the curved shape of a ranat ek or the bundled bamboo pipes of a khaen, but it can’t answer that question — hearing one played is what actually makes the differences stick. That gap between seeing an instrument and hearing it is why we put together this guide: ten instruments, with videos to help you hear most of them, and a sense of what to listen for in each.
The photographs below were taken during a visit to Vithidham School in Sakon Nakhon, where the head of the secondary school, Chorlada Suppaso, and music teacher Thanatip Somkham walked us through the instruments taught to students there. Some belong to the broader tradition of Thai classical music. Others are tied specifically to Isan, the northeastern region where Sakon Nakhon sits.
This piece sticks to the instruments themselves — what each one is, how it’s held or struck or bowed, and how to tell it apart from its closest relatives. For background on the music itself, our beginner’s guide to Thai music covers more ground.
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Traditional Thai Musical Instruments: A Quick Guide
- Struck: Ranat ek, khim, and pong lang all produce their notes when something — a mallet, a beater — hits a bar or string.
- Plucked: Phin and chakhe are both string instruments, but you play them in almost opposite positions, and they sound nothing alike.
- Bowed: Saw duang, saw u, and saw sam sai hold a note as long as the bow keeps moving.
- Hand drum: The thon has no fixed pitch, just rhythm and tone.
- Wind: The khaen gets its sound from metal reeds tucked inside bamboo pipes.
Treat these categories as a starting point rather than a strict rulebook — where an instrument sits in a performance depends heavily on the piece being played, and Thai classical ensembles handle these instruments differently than Isan folk groups do. Our guide to Thai music genres gets into how those styles connect to what you’d hear on the radio today.
Ranat Ek (ระนาดเอก): The Thai Xylophone
The ranat ek is a wooden xylophone whose bars hang suspended over a long, curved resonator shaped almost like a boat. The player sits behind it with a mallet in each hand. Bar counts vary by instrument — the example in Grinnell College’s musical instrument collection has 21.
Mallet choice changes everything about the tone. Hard mallets bite; soft ones round the edges off. Watch a skilled player move through a fast passage and the mallets blur — notes seem to pour from one end of the instrument to the other faster than the eye can track. That’s part of why the ranat ek tends to dominate a Thai classical ensemble even when it isn’t playing loudest.
Phin (พิณ): The Plucked Sound of Isan
The phin is a plucked string instrument that signals “Isan” the moment you hear it. Most versions have three strings, played with a plectrum — traditionally a sliver of bamboo, though plenty of musicians now just use a guitar pick.
The sound is light and quick, built to cut through even a busy mix. In Isan music the phin often carries the melody, which is one reason it shows up so heavily in pong lang groups and faster styles like mor lam sing. Its distinctive twang can also be heard in contemporary northeastern pop. Watch a player’s hands closely and you’ll see the division of labor: one hand plucks and drives the rhythm, the other slides along the neck to shift pitch. What looks effortless up close is actually two independent, fast-moving jobs happening at once.
Khim (ขิม): The Thai Hammered Dulcimer
The khim is a hammered dulcimer that arrived in Thailand from China, played by striking the strings from above with two slender, flexible beaters rather than plucking them. The result rings and lingers rather than snapping to a stop the way a plucked note does.
Shapes vary — some khim are trapezoidal, others more butterfly-like — and players commonly sit on the floor beside the instrument, though it works just as well set up for someone in a chair. From across a room, it’s easy to mix up the khim with the ranat ek, since both involve two hands striking something rhythmically. Get closer and the difference is obvious: the ranat ek has solid wooden bars, the khim has taut strings, and the wooden attack of one sounds nothing like the metallic shimmer of the other.
Chakhe (จะเข้): The Crocodile-Shaped Lute
The chakhe is a three-string lute played lying flat on the floor, propped on short legs, with the musician seated beside it to pluck the strings. Its name comes from chorakhe, the Thai word for crocodile, and one look at its long, low body explains why.
Where the phin is held and carried, the chakhe stays put on the floor. Its plucked notes have a fuller, more resonant quality. It’s the instrument you’d expect in a mahori ensemble rather than a folk group. Watch a chakhe player’s hands and you’ll notice the plucking hand does the initial work while the other hand travels along the string to bend the pitch — small adjustments that give a phrase its shape.
Saw Duang (ซอด้วง): A Bright Two-String Fiddle
The saw duang is a small, upright two-string fiddle — the first of three bowed instruments in this guide, and the easiest to spot by ear. The bow stays threaded permanently between its strings, a setup that forces a different bowing motion than you’d use on a violin.
Its voice is high and bright, sharp enough to slice through a full ensemble and carry a melody line above everything else. The small body doesn’t photograph as dramatically as some other instruments here, but set it next to the saw u below and the contrast in register is immediate.
Saw U (ซออู้): The Lower, Mellow Bowed Instrument
The saw u is another two-string, upright bowed fiddle from the same family as the saw duang, but it trades brightness for warmth. Its rounded resonating body is the giveaway if you’re trying to identify one by sight rather than sound.
Play the saw duang and saw u videos back to back and the difference stops being abstract. One has an edge that grabs your attention; the other sinks lower and rounder, almost conversational by comparison. Together they’re a reminder that “Thai fiddle” tells you almost nothing about how an instrument will actually sound.
Saw Sam Sai (ซอสามสาย): The Three-String Fiddle
Saw sam sai translates plainly enough — “three-string fiddle” — and that extra string is the fastest way to tell it apart from its two-string cousins above. It also tends to be the most ornately built of the three, which has helped cement its reputation as an instrument for refined, formal performance.
The sound rewards patience more than the other two. A skilled player can hold a single note, shift its pressure mid-breath, and glide into the next phrase. Those details can be hard to catch in a short clip from a full ensemble recording. Watching one musician play solo makes it easier to hear what the instrument is doing.
If you want a quick ear-training exercise, cue up the saw duang, saw u, and saw sam sai videos in that order. The shared bowing technique becomes obvious fast — and so does how differently each one is voiced.
Pong Lang (โปงลาง): The Hanging Isan Xylophone
The pong lang is a set of tuned wooden bars, hung in a descending row and struck with mallets — about as central to Isan folk performance as an instrument gets. The style of ensemble built around it borrows the same name.
Both the pong lang and the ranat ek rely on struck wooden bars, but that’s roughly where the similarity ends. The ranat ek’s bars sit suspended above a curved resonating box; the pong lang’s just hang in a line, exposed. Musically, the pong lang belongs to a livelier, more percussive setting — often working alongside the phin to drive a piece forward rather than carrying a single melodic thread. It’s also common to see two musicians share one pong lang, each taking a different part of the pattern. If you ever get the chance to watch this live, position yourself where you can actually see the mallets — the interplay between two players is half the show.
Thon (โทน): A Hand-Played Thai Drum
The thon is a single-headed Thai drum played entirely by hand — and unlike every instrument above it, it doesn’t carry a melody you could hum back. Its job is rhythm, full stop. A skilled player gets remarkable variety out of it just by changing where on the head they strike and how they use the open end of the drum’s body.
Thon come in more than one form — the wooden thon chatri and the ceramic thon mahori are both common — and while their bodies look different, the technique is the same balancing act: loud strikes for emphasis, muted ones for texture. It’s worth listening past the obvious downbeats to the quieter sounds filling the space between them; that’s usually where a good thon player is doing the most interesting work.
Khaen (แคน): The Bamboo Mouth Organ of Isan
The khaen is a bamboo mouth organ, its pipes each fitted with a small metal reed — the player blows into a mouthpiece while covering and uncovering holes with their fingers, and the result is arguably the single most recognizable sound in Isan music. Its ties run deep into Lao musical culture, a connection that reflects the shared heritage stretching across the Mekong.
Ask most listeners which instrument they associate with mor lam and the khaen is the answer. It can back a singer or stand entirely on its own — either way, that continuous, reedy drone is unmistakable once you’ve heard it. The photo above, incidentally, isn’t a musician at all: it’s the entrance to Ban Don Khaen, a Sakon Nakhon village whose gate pillars are shaped like khaen pipes, a nod to just how locally iconic the instrument is.
UNESCO recognizes khaen music of the Lao people as a living tradition — a designation specific to Laos, though the instrument is every bit as familiar across northeastern Thailand. Our introduction to mor lam and other Thai music genres has more on the styles built around it.
How to Tell These Thai Instruments Apart by Ear
Start with the basic question: what is the player physically doing to make a sound? Striking wooden bars narrows you to the ranat ek or pong lang — check the shape to tell them apart, since one sits over a curved resonator and the other hangs in a row. Striking strings means khim. A plucked instrument resting flat on the floor is the chakhe; a plucked instrument held in the hands is the phin.
For the three bowed instruments, string count and pitch do the work: two strings and a bright edge is the saw duang, two strings and a warmer, lower voice is the saw u, three strings is the saw sam sai. The thon gives itself away by rhythm rather than melody. And the khaen, once you’ve heard its reeds even once, isn’t easily confused with anything else on this list.
Ten instruments is a lot to hold in your head at once, so don’t try. Pick two related ones — the saw duang and saw u, say, or the ranat ek and pong lang — and play their videos back to back. That kind of side-by-side listening does more than any written description can. From there, our guide to discovering Thai music and the Thailand music festival guide are good next stops if you want to hear any of this live.
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