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PitchTimbreChinese Pentatonic ModesGuqinPipaErhuDiziHarpClavichord

The zheng shares silk and plucking with the guqin — and the fork between them is a single thing:

⚠️ The zheng has bridges; the guqin has none. | | Guqin (no bridges) | Zheng (one bridge per string) | |---|---|---| | Where the pitch comes from | left hand stops a string, in the moment | set in advance by the bridge | | Notes per string | many (wherever you stop it) | one | | What the player does | makes the note and sounds it | merely chooses a string | | Volume | small | far larger | | Setting | a study, played for oneself | a stage, an ensemble, a roomful of people | One structural compromise, two destinies. The zheng moves "choosing the pitch" out of the left hand and into the few minutes of tuning — buying more volume and more speed, and paying with one note per string. "Moving the bridge sets the pitch" is the zheng's most conspicuous feature: to change a note, you move a post.

Structure: one string, one bridge, one box

Three points:

1. The bridges form a rising line, from the lowest string to the highest, like a flock in flight — hence "goose bridges". Moving one changes a pitch (moving the bridge sets the pitch). 2. String count is its range history: from the earliest five, to twelve in the Qin–Han, thirteen in the Tang–Song, fourteen to sixteen in the Ming–Qing, to twenty-one today — add a string, gain a note. 3. It and the harp are the same solution in two directions: the harp gives different pitches by strings of different lengths; the zheng uses one row of strings plus movable bridges to make each string's speaking length different. One makes strings, the other moves posts.

Bridged and unbridged

This figure is the page's fork:

• Unbridged (the guqin, and the stopped notes of the pipa): the left hand stops wherever it likes, one string yields many notes, and pitch is a continuous line — at the cost of low volume and little speed.
• Bridged (the zheng): one note per string, the pitch settled at tuning — buying far more volume (the bridge holds the string's tension, with a large box) and far more speed (the right hand merely plucks).
• And the cost is obvious too: more notes means more strings — which is why the zheng's string count is its range history: 5 → 12 → 13 → 16 → 21 → 25.

One structural compromise, two destinies: one plays for its owner, the other for a roomful of people.

"Complementing the note with nuance": only five notes are tuned

The zheng is tuned to a pentatonic scale — meaning there is no string for fa or si.

So where do those two notes come from? They are pressed out on the mi and la strings. This technique has a lovely name: "using nuance to supply the note" — filling the gap in *notes* with *nuance*.

Three consequences follow:

1. The left hand is not unemployed. The right hand chooses strings; the left hand presses the missing notes out of them. 2. Pressing becomes the source of its style. Differences in force, depth and duration of the press give regional repertoires their different flavours — which is the deeper meaning of the phrase: the two missing notes are a technical problem, but *how you press* is an artistic one. 3. It walks on two legs at once: adding strings solves range, pressing solves the gaps — and those two roads correspond to two other threads of this project.

Range

筝属弦鸣乐器（拨弦，一弦一柱）。二十一弦筝音域为 D2–D6，共四个八度；其他规格：十三弦为 A–d²、十六弦为 A–a²、二十五弦可达 A¹–g³ 或 D–b³。乐团合奏亦用二十五 · 二十六弦。定弦按五声音阶排列，fa 与 si 需在 mi · la 两弦上按弦取得。记谱即实音。

• Four octaves (D2–D6 on 21 strings) — slightly narrower than the guqin, but much heavier in the bass.
• Its bass is real bass. The guqin's low register is a set of points on seven open strings; the zheng uses longer, thicker strings and a large box, which is one reason it is so much louder.
• Adding strings adds range: orchestras often use 25 or 26-string zhengs, plus high and low models — one instrument, divided by register.

Timbre, and how to hear it

Four cues:

1. Bright, firm, long-ringing. The large soundbox makes it brighter and more outgoing than the guqin. 2. Distinct beads of sound. *Yao zhi* (rapid repetition on one string) joins the beads into a line, and *gua zou* (sweeping across a run of strings) is a water-like slide. 3. Heavy bass, clear treble. Four octaves make the registers plainly different. 4. "The piano of the East" describes its role: wide range, good volume, good harmony — an instrument that can be put on a big occasion.

Playing techniques

• Right hand plucks, left hand presses. The right hand uses thumb, index and middle finger (usually with picks: tortoiseshell, nylon or plastic, taped to the first joint of the finger); the left hand presses the strings to the left of the bridges, changing tension to colour the melody.
• Right-hand techniques: to, pi, tiao, mo, ti, gou, yao, cuo — with yao zhi turning points into lines and gua zou sweeping whole runs.
• Left-hand techniques: pressing, sliding, vibrato, tremolo, harmonics, damping, hooked plucking.
• Played with picks by most modern players, though some schools play bare-handed — and the timbre differs.
• Five regional schools: Shaanxi · Henan · Shandong · Zhejiang · Hakka (plus Chaozhou and Fujian styles), whose differences are directly tied to how the strings are pressed.

The family

The axis in this family is "at what moment the pitch is decided": at making (harp) · at tuning (zheng) · at the instant of pressing (guqin, pipa, clavichord). The later the decision, the more work the hands must do — and the more volume and speed are limited. The trade cannot be taken from both ends.

History

Its contrast with the guqin runs through the whole history: one side is "the gentleman never puts aside his qin" (an object of cultivation, played for oneself); the other is "the sound of Qin" (public, loud, plentiful). The same material and the same plucking — and because of one row of posts, two different lives.

Common misconceptions

• "The zheng is the guqin." Two instruments: the guqin has seven strings and no bridges; the zheng has twenty-one strings and one bridge each; the guqin is quiet and belongs to a study, the zheng is loud and often on stage. The shortest test: are there bridges?
• "Twenty-one strings means twenty-one notes." It has twenty-one open-string notes, but fa and si are pressed out of the mi and la strings — so it can play more notes than it has strings.
• "A pentatonic tuning means it cannot play seven-note scales." It can: with fa and si pressed in, pentatonic, hexatonic and heptatonic music are all playable.
• "Bridges mean the pitch cannot be changed." The bridges move, and moving them to set the pitch is the zheng's signature. You simply cannot move one *while playing* — that is a tuner's job.
• "It is only a folk instrument for festive occasions." It was equally important in court music (Han xianghe, Sui nine-part, Tang ten-part ensembles), and it has a full solo tradition and schools.
• "The bayin says silk, so only silk strings will do." As with the guqin: the bayin records the material of its own time; nylon-wound steel is now standard, louder and more stable.

Next

A few more specialised plucked instruments remain: the ruan (round-bodied, straight-necked) and the sanxian (fretless, with a drum for a body) — together they will put the three choices — bridged, fretted, or neither — side by side in one comparison.

And the bowed branch still has only the erhu: next come the banhu and the jinghu, which take "swap the resonator" as far as it will go: two strings, one different soundbox, and an entire operatic voice comes out. :::

Sources

• 形制依通行乐器资料：长方形木质音箱（面板有弧度 · 桐木），弦两端搭在山口上；一弦设一柱，琴码（雁柱）可自由移动，移柱应律；现代最常用 21 弦
• 「筝属弦鸣乐器（拨弦）」依 Hornbostel–Sachs 分类
• 「按五声音阶排列定弦；fa 与 si 两音是在 mi 与 la 两弦上通过按弦发出」依通行资料 —— 这一特色称为「以韵补声」
• 「音域：13 弦为 A–d² · 16 弦为 A–a² · 21 弦为 D–d³（即 D2–D6，四个八度）· 25 弦为 A¹–g³ 或 D–b³」依通行资料
• 「弦数演变：最早五弦（一说二十五弦）→ 秦汉十二弦 → 唐宋十二 · 十三弦 → 明清十四 · 十五 · 十六弦 → 现代二十一弦，乐团合奏亦用二十五 · 二十六弦」依通行资料
• 历史：「春秋时期秦国已存在，用于原始舞乐，故又名秦筝」；《史记·李斯列传·谏逐客书》有「夫击瓮叩缶、弹筝搏髀，而歌呜呜快耳者，真秦之声也」
• 「演奏多戴义甲（玳瑁 · 尼龙 · 塑料制），以胶带固定于第一指节；也有流派不戴」依通行资料
• 「按地域风格分五大流派：陕西 · 河南 · 山东 · 浙江 · 客家（另有潮州筝 · 福建筝等）」依通行资料
• 「筝属于八音中的丝」依通行资料

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