ChenYN Piano Tuner 陈师傅调音—贝希斯坦（A175）止音器修复暨调音测试

《多布罗吉亚舞曲》托卡塔 – Joc Dobrogean是作曲家康斯坦丁涅斯库的作品，采用了托卡塔的体裁形式在演奏技巧方面颇具特色。托卡塔揭示了作曲家的高超创作技巧，能够从细小的音乐火花出发，铺陈出一段段饱满而富于变化的音乐内容，这就是我再次聆听年仅11岁琴童演奏托卡塔所震撼之处！

多年调音体会之一：贝希斯坦钢琴均在德国工厂调音至标准音高 A4 = 445Hz，钢琴预计在这种情况下从工厂发货运输到客户的家中，高张力补偿了新琴弦在第一年内的大量变化。（调音新标准须依据客户要求或音乐会演出标准而确定音高440-442Hz）

多年维修调整体会之二：即使是经验丰富的专业维修技师全面安装止音器也需要 2 至 2.5 小时，而单独调整止音器则大致需要0.5-1.5小时。经过专业培训才能调整三角钢琴的止音系统，维修调整类手册与师徒口述还是有区别的；仅有手册是无法对三角钢琴止音系统进行正确调整的。

多年的维修调整体会之三：常见的止音器系统有……且标准如下。

●Renner

●日本Tokiwa

●施坦威原装（汉堡和纽约）

●美国雷诺 Baldassin 三合一止音器系统……

三角钢琴止音器调整标准

– 所有止音器应在相同的键深情况下向上提升

– 使用延音踏板必须同时提升所有止音器

– 止音器丝杆和制音器必须绝对垂直地上下移动

– 当止音器位于琴弦上时，所有琴弦都必须精确静音

– 所有止音器必须与琴弦完美对齐且间距相等

2025年12月与纽约

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ChenYN Piano Tuner – Bechstein (A175) Mute Repair and Tuning Test

Joc Dobrogean, a toccata by Constantinescu, is a work that employs the toccata form and is quite distinctive in its performance techniques. The toccata reveals the composer’s superb compositional skills, his ability to start from subtle musical sparks and unfold into rich and varied musical content. This is what made me so amazed when I heard an 11-year-old piano student play the toccata again!

One of my years of experience in tuning pianos is that all Bechstein pianos are tuned to the standard pitch A4 = 445Hz in the German factory. The piano is then shipped from the factory to the customer’s home under these conditions, with high tension compensating for the significant changes that new strings undergo during the first year. (The new tuning standard will be determined based on customer requirements or concert performance standards, ranging from 440-442Hz.)

My second lesson learned from years of repair and adjustment experience: Even experienced professional technicians need 2 to 2.5 hours to fully install the dampers, while adjusting just the dampers takes approximately 0.5 to 1.5 hours. Adjusting the damping system of a grand piano requires professional training; there’s a difference between repair and adjustment manuals and oral instruction from a master and apprentice. A manual alone is insufficient for correctly adjusting the damping system of a grand piano.

Thirdly, based on years of experience in repairing and adjusting pianos: Common damper systems include… and the standards are as follows:

●Renner ●Tokiwa (Japan) ●Steinway Original (Hamburg and New York) ●Baldassin (USA) Three-in-one damper system…

Grand Piano Damper Adjustment Standards

– All dampers should be raised with the same key depth. – When using the sustain pedal, all dampers must be raised simultaneously.

– The damper screw and damper must move up and down absolutely vertically.

– When the dampers are on the strings, all strings must be precisely muted.

– All dampers must be perfectly aligned with the strings and evenly spaced.

December 2025, New York

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