Qualifications as a professional Piano tuner.

The formal training has reached the required standard hours and obtained the Andhadhun certificate.

The qualification of tuning personnel is divided into two parts: "theoretical knowledge" examination and "skill operation" examination.

1, the theoretical knowledge test is conducted in a standard classroom by closed-book written test or computer;

2. The skill operation test is conducted in a practical way at the operation site of the simulation site, equipped with necessary audio equipment and equipment.

Extended data:

Andhadhun level judgment

(1) complete tools, accessories and maintenance materials.

⑵ Adjustment time: Normal adjustment is generally between one hour and two and a half hours. No matter how skilled the tuning lawyer is, it is not appropriate to tune the piano within 40 minutes, so as not to affect the stability of pitch. The tuning time exceeds 3 hours, indicating that Andhadhun is not skilled. If maintenance or adjustment is needed, the time may be longer.

(3) Whether the standard pitch is consistent with the pitch (tuning fork).

(4) Whether the tactile sensation is improved.

5. How accurate the pitch is: Check it by playing scales and intervals of four degrees, five degrees and eight degrees (or two or three octaves). Generally speaking, treble and bass are difficult to tune, which is a test for tuning lawyers.

[6] Whether there are any problems left over after adjustment, such as insensitive keys and broken strings.