It's just sound. What kind of sound is recognized, accepted, and considered good by everyone? This is the fundamental problem. As for some antique pianos that cannot be repaired or used, they are at best antiques and can only provide reference data compared to qin makers.

There are different opinions about the sound of the violin, but they are all heard with the ears and seen with the eyes. In recent years, although some scientific methods and testing equipment have been used domestically and internationally to conduct some inspections, they are still extremely confidential and rarely disclosed to the world.

In essence, based on years of analysis and personal experience, the author believes that the conclusion of violin testing should not be solely judged by the eyes and ears of various schools, but should be supported by relative scientific data to convince people with reason.

Therefore, the author believes that we already have a scientifically validated tool, but it has not been valued by many people yet. As long as it is used in a music editor to compare and analyze the frequency spectrum of high and low frequencies through the harmonic editor of the audio, the violin will speak on its own, and it will tell you which category and level it belongs to, and everyone can be a musician. The details displayed in the spectrum analysis waveform are very clear and convincing, but there is currently no relatively specific standard data available.

The author's identification method is actually very simple and not difficult. Use a sound collector to collect violin components or audio samples from trial plays, WAV and MP3 analog audio can be used, and then put them in a music editor. Use a waveform editor, and use a spectrum frequency editor and a spectrum tone editor respectively. First, use the spectrum tone editor to shield or limit the high and low frequencies of the collected audio, and then use the spectrum frequency editor to shield or limit the high and low frequencies of the collected audio, and obtain the total waveform data of the frequency harmonics of the audio. Then, refer to the best audio waveform for analysis and comparison.

By the way, 'refer to the best audio waveform', we can download and store audio waveforms ourselves, such as the Amati Guqin 1572, 1648 audio, the Si style Guqin 1714, 1716, 1728, 1732, or the Guashi Guqin 1735, 1741, 1742, 1743, etc., which can be retrieved and used at any time.