Guzheng Care in Winter: Humidity, Tuning and Bridges · 冬季古筝保养
A guzheng is mostly wood, and wood responds to the air around it. In a European winter – radiators on, windows closed, cold air outside – that air becomes very dry indoors. Here is how to keep your instrument stable, in tune and safe until spring.
Why winter is hard on a guzheng
The soundboard of almost every guzheng is paulownia (桐木), a light, soft wood chosen because it vibrates freely. The same quality makes it sensitive to humidity. When cold outside air is heated indoors, its relative humidity drops – often well below 40% in a centrally heated room. The wood gives off moisture and shrinks slightly; when the heating goes off or the weather turns damp, it takes moisture back.
Those small movements are what you notice as a player:
- the tuning drifts more than usual from one day to the next;
- bridges (雁柱) lean or creep out of position;
- a string begins to buzz against a bridge or the board;
- in more extreme cases, joints open or a crack appears in the soundboard.
The good news: most of this is preventable with a few simple habits.
1. Choose the right spot in the room
- Keep it away from heat sources. Do not place the guzheng next to a radiator, heater, fireplace or in direct sun. A distance of at least one to two metres from a radiator is a sensible minimum.
- Avoid draughts. Windows and outside doors cause rapid temperature changes. An inner wall is usually the most stable place.
- Underfloor heating? Keep the instrument on its stand rather than lying on a heated floor.
- Cover it. When you are not playing, a cloth cover or the soft case slows down changes in temperature and humidity.
2. Measure and manage humidity
A simple digital hygrometer costs little and tells you what the room is really like. A stable relative humidity of roughly 40–60% is a good target for wooden instruments. If your room regularly falls below that in winter, a room humidifier is the most effective fix. Stability matters as much as the number: slow changes are far kinder to the wood than sudden ones.
3. Retune more often – and check your bridges
In winter, expect to tune before every practice session. A modern 21-string guzheng is usually tuned to a D major pentatonic scale (D, E, F♯, A, B) across four octaves; a clip-on or app tuner makes this quick.
- Tune gradually and evenly across the instrument rather than bringing one string far up at once.
- Look along the bridges after tuning: they should stand upright, in a smooth curve. If one has leaned or moved, loosen that string slightly, set the bridge straight, then retune.
- If a bridge keeps sliding, the cause is often a large change in humidity – check your hygrometer.
4. Travelling to lessons in the cold
Carrying your guzheng to a lesson or concert in winter? Use the padded bag, avoid leaving it in a cold car, and when you arrive, let it acclimatise in its bag for a while before you open it and tune. A slow return to room temperature is gentler on the wood and the finish than an instant change.
5. Strings, picks and longer breaks
- Strings: wipe them with a soft dry cloth after playing. Replace a string when it sounds dull, will not hold its pitch, or shows wear.
- Picks and tape: keep spare tape in your case – a set of picks that is comfortable makes winter practice far more enjoyable.
- Not playing for several weeks? Many teachers advise lowering the tension slightly (for example by about a semitone) during long breaks, and bringing it back up gradually when you start again.
When to ask for help
Contact a teacher or us if you see a crack or an open joint, if a buzz will not go away after you reposition the bridge, or if one area of the instrument will not stay in tune at all. Small issues are much easier to deal with early.
Winter checklist
- Away from radiators, heaters, sun and draughts
- Hygrometer in the room; aim for 40–60% relative humidity
- Humidifier if the room is regularly drier
- Covered when not in use
- Tune before every session; check the bridges stand straight
- Let the instrument acclimatise after travelling in the cold
Choosing a new instrument? Our guzheng buying guide explains sizes, levels, woods and construction, and our teachers are happy to advise – see Lessons & Schools.
冬季古筝保养：湿度、调音与雁柱
古筝的主体是木头，而木头会随着周围空气的变化而变化。欧洲的冬天，屋里开着暖气、关着窗、外面天冷，室内空气会变得非常干燥。下面告诉您，怎样让古筝一直到春天都稳定、不跑音、不受损。
为什么冬天对古筝不友好
几乎所有古筝的面板都是桐木，这种木头轻而软，振动自由，所以才被选来做面板；但也正因为如此，它对湿度很敏感。寒冷的室外空气进屋被加热后，相对湿度会下降，开着暖气的房间常常远低于 40%。木头会失去水分、轻微收缩；等暖气关掉或天气转潮，又会重新吸收水分。
这些细小的变化，弹琴的人会这样感觉到：
- 音准比平时更容易一天一变；
- 雁柱歪斜，或慢慢移位；
- 某根弦开始和雁柱或面板摩擦，发出杂音；
- 更严重时，会开胶，或面板出现裂缝。
好消息是：只要养成几个简单的习惯，大部分问题都可以避免。
1. 选好摆放位置
- 远离热源。不要把古筝放在暖气片、取暖器、壁炉旁边，也不要让阳光直射。和暖气片至少保持一到两米的距离比较稳妥。
- 避开风口。窗户和外门会带来急剧的温度变化，靠内墙通常最稳定。
- 有地暖？请把琴放在筝架上，不要平放在发热的地面上。
- 盖起来。不弹的时候，盖上琴罩或放进软琴包，可以减缓温度和湿度的变化。
2. 测量并控制湿度
一个普通的电子湿度计花不了多少钱，却能告诉您房间的真实情况。对木制乐器来说，相对湿度稳定在大约 40–60% 是比较好的目标。如果冬天房间经常低于这个范围，用加湿器是最有效的办法。和数字同样重要的是稳定：缓慢的变化对木头要温和得多。
3. 多调音，并检查雁柱
冬天要做好每次练琴前都调音的准备。现代 21 弦古筝通常按 D 调五声音阶（D、E、升 F、A、B）定弦，跨四个八度；用夹式调音器或手机调音软件会很快。
- 调音时整体逐步、均匀地调，不要把某一根弦一下子拉高很多。
- 调完后顺着雁柱看一遍：它们应该直立，排成一条顺滑的曲线。如果某个雁柱歪了或移动了，先把那根弦稍微放松，扶正雁柱，再重新调音。
- 如果雁柱总是滑动，原因往往是湿度变化太大，请看一下湿度计。
4. 冬天带琴去上课
冬天带古筝去上课或演出？请用加厚琴包，不要把琴留在冰冷的车里；到达后，先连包放一会儿，让琴适应室温，再打开调音。慢慢回到室温，对木头和漆面都比骤变温和得多。
5. 琴弦、指甲和长时间不弹
- 琴弦：弹完后用干燥的软布擦一擦。琴弦声音发闷、定不住音或明显磨损时，就该更换了。
- 指甲和胶布：琴包里备一些胶布。一副戴着舒服的指甲，会让冬天练琴愉快很多。
- 几周不弹？很多老师建议在长时间不弹时把弦稍微放松（例如降低约半音），重新开始弹时再慢慢调回。
什么时候需要求助
如果发现裂缝或开胶，调整雁柱后杂音仍然存在，或者琴的某个区域完全定不住音，请联系老师或我们。小问题越早处理越容易。
冬季检查清单
- 远离暖气、取暖器、阳光和风口
- 房间放湿度计，目标相对湿度 40–60%
- 房间经常偏干时使用加湿器
- 不弹时盖好琴罩
- 每次练琴前调音，检查雁柱是否直立
- 冷天出门回来，先让琴适应室温