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PitchChromatic ScaleTimbreArticulation MarksBianzhongGongGuqinShengXun

The bianqing is the last of the eight bayin categories: stone.

It is the partner of the bianzhong — the ancients called their combined sound "the voice of metal and stone", and the phrase "metal sounding, jade ringing" (from Mencius) later came to name this pairing: the bell begins, the chime closes.

⚠️ It forces the hardest question in this batch: how do you make a pitch in a piece of stone? Metal can be melted, wood carved, skin tightened or loosened — but stone can neither be melted nor added to. The only way to change its pitch is to grind some away. Hence a property no other instrument here has: a bianqing's tuning only ever subtracts — material can be ground away and never added back. (⚠️ The pitch, though, can still move both ways: grind the faces to lower it, the ends to raise it — see the *Kao Gong Ji* section below.) | | Bianzhong | Bianqing | |---|---|---| | Material | bronze | stone (limestone · marble · jade) | | How pitch is set | casting | grinding | | After a mistake | can be melted and recast | material can only be removed — no return | | Unit of making | formed at once, reproducible | ground piece by piece, not reproducible | One goal — writing the pitch into the material in advance — reached by two entirely different crafts.

Structure: a bent slab, hung on a cord

Three points:

1. A bent plate. The shape is called juju: a slab folded at an obtuse angle with a suspension hole at the top. Shang-period chimes were mostly right-triangles with a curved top; the bent form settled from the Western Zhou onward — it is a product of shape, not of length. 2. Size and thickness set the pitch. A chime is a vibrating plate: a bigger, thinner slab sounds lower; a smaller, thicker one sounds higher (plate frequency is proportional to thickness). A set is therefore a graded row of slabs — structurally the same idea as bells hung in order of size. 3. It is clearer than a bell. The bell is louder with a longer ring, while a chime decays quickly and speaks promptly — so when the two play together the chime is not buried, and instead articulates the rhythm.

Cast or ground: two roads, one goal

This figure is the heart of the page, turning "material decides craft" into a direct comparison.

• Casting: the melt is poured into a mould, formed at once; a wrong pitch can be fixed by melting and recasting, and copies can be made. (A finished bell is still fine-tuned by grinding its inner wall — but that is adjustment after the form exists.)
• Grinding: the slab is shaped and then ground into tune; stone can neither be melted nor added, so material can only be removed. But where you remove it decides which way the pitch goes — exactly what the *Kao Gong Ji* records: "if too high, grind the faces; if too low, grind the ends." Grinding the two faces makes the slab relatively thinner → lower; grinding the ends makes it relatively thicker → higher. Jia Gongyan (Tang dynasty) summed it up as "thick, and the note is clear; thin, and the note is muddy." ⚠️ Material only ever decreases — but pitch can still be tuned in both directions. That is quantitative command of plate vibration, two thousand years early.

And that irreversibility left archaeological evidence: of the 32 slabs of the Zeng Hou Yi bianqing, only 9 survived intact (the rest were crushed and crumbled), while the 65 bells from the same tomb were still hanging on their frame, still remarkably in tune. Two instruments buried together for 2,400 years — stone is more brittle than bronze, so the bayin's material-based scheme produced its own verdict: material decides who gets to come through.

Range

编磬属体鸣乐器（石片磨制，敲击，有固定音高）。每套编磬的音高由磬块的大小与厚薄决定：曾侯乙编磬共 32 块，分上下两层四组，经复原研究音域跨三个八度、十二半音齐备、可以旋宫转调。此处按「跨三个八度」取 C3–C6 示意 —— 各套编磬块数与音高不同，本图不代表所有编磬。记谱即实音。

• Three octaves, all twelve semitones, and key changes — the same class of capability as the bells.
• But the number of slabs sets everything: the Zeng Hou Yi bianqing has 32 slabs, the bianzhong 65 bells — stone must be ground one piece at a time, so fewer of them were made.
• C3–C6 is indicative only: a real set's pitches follow the dimensions of its own slabs.

Timbre, and how to hear it

Four cues:

1. Bright and hollow. Struck stone sounds thinner and emptier than bronze — the old texts call it "clear and ringing", where the bell is "full and loud". 2. Short ring, quick speech. It lacks the bell's long tail: the sound arrives and leaves quickly, which is why it marks rhythm more clearly. 3. It is not masked. The bell is louder and rings longer, but a chime carries — in ensemble each takes a layer: the bell gives thickness, the chime draws the outline. 4. You hear it in slabs. A set is a graded row of stones: higher pitch, smaller slab.

Playing techniques

• Kneeling to strike. The record for the Zeng Hou Yi set is one player holding a mallet in both hands, kneeling — unlike the bells, which take a team; a set of chimes is far smaller.
• Strike the longer arm (gu). The longer arm is the main striking area, the shorter one (gu, a different character) the other.
• Several strokes. Single, double, rolled, scraped and shaken — even though it is a pitched instrument, its technique is not just "one hit".
• Usually with the bells. A set can play melody alone, but metal and stone sounding together is its formal place in ritual music.
• Pitch cannot be changed live. As with the bells: it plays only the notes already ground into it.

The family

Metal and stone are the only two "hard material" categories in the bayin — and they share one property: the pitch must be built into the material by craft, before any performance. Their difference is equally plain: one can be redone, the other cannot.

History

Its fate forms the sharpest contrast in this batch with the bianzhong: one tomb, one era, one ritual system — one set came through almost untouched, the other left nine pieces. The bayin sorts by material; and material, in the end, decides who is still sounding two thousand years later.

Common misconceptions

• "A chime and a bell are much the same." Different material (stone vs bronze), different craft (grinding vs casting), different consequences (irreversible vs recastable) and different colour (thin and clear vs thick and full).
• "You cannot make stone sound in tune." The Zeng Hou Yi bianqing covers three octaves, all twelve semitones, with key changes — the same class as the bells. Difficult is not the same as inaccurate.
• "A chime's pitch can be adjusted while playing." Not at all — it is ground in advance, and like the bells it belongs to the instruments that hand the pitch away.
• "A chime is just a companion to the bells." It plays melody on its own; and in ensemble it does precisely what the bell cannot: draw the contour clearly.
• "Bianqing and teqing are the same." The teqing is a single large chime (for sacrifice); the bianqing is a set (for court music) — two classes by venue and arrangement.
• "Stone in the bayin is just a material label." It is only a material label — but here it decides three things: the craft (grinding only), the colour (thin and hollow), and whether the object survives time.

Next

All eight bayin categories are now complete.

From here the batch expands by how the instrument is played — wind → plucked → bowed → struck — filling in the more specialised members of each group (xiao, suona, zheng, ruan, banhu, yunluo …). And the eight threads already established will carry into every new instrument — the newest of them being the one the bianqing just supplied: with one goal in view, the material decides which road you may take, and whether you can turn back. :::

Sources

• 形制依通行乐器资料与考古资料：石片磨制而成，形若倨句（钝角形）；上端有倨孔穿绳悬挂；单个大石磬称特磬，多枚音高不同者称编磬
• 「编磬属体鸣乐器（敲击），可击奏旋律；常与编钟相配，合奏『金石之声』」依擂鼓墩文物保护中心资料
• 「曾侯乙编磬：1978 年湖北随县（今随州）擂鼓墩一号墓出土，共 32 块，以石灰石或大理石磨成，分上下两层四组悬挂于青铜错金磬架」依考古资料
• 「磬上刻有编号与乐律铭文计 708 字，意与编钟铭辞相通；经复原研究，音域跨三个八度，十二半音齐备，可以旋宫转调」依擂鼓墩文物保护中心资料
• 「曾侯乙编磬出土时大多已压碎粉化，完好的仅 9 枚（1980 年制成复制品）」依随州市政府文物资料
• 「磬最早见于约 4000 年前的龙山文化遗址（山西襄汾陶寺），为天然大石片打制而成、带穿绳索孔，是最早悬挂的乐器；河南安阳武官村大墓出土商代虎纹大石磬」依考古资料
• 「磬的形制演变：商代多为上弧下直的不等边三角形；西周至战国上为倨句形、下微弧；汉代以后上下均为倨句形」依考古资料
• ⚠️ 音高方向（2026-09-26 修正）：「磬板越大、越薄，其振动发声越低；磬板越小、越厚，其振动发声越高」依板振动原理与《考工记》研究（板振动的频率正比于厚度）
• 「《考工记·磬氏》：『已上则磨其旁，已下则磨其端』 —— 音过高就磨两个正面（相对变薄 → 降音），音过低就磨端面（相对变厚 → 升音）；唐贾公彦疏：『凡乐器，厚则声清，薄则声浊』」依文献
• 「清代宫廷编磬十六枚一组，大小同制，以磬体之薄厚区分音高，声音由低到高，厚度依次递增」依清宫编磬资料
• 「磬属于八音中的石」依通行资料

Used for fact-checking only; all prose is original.