4、 Column end face treatment and violin tone:

1. The end face of the sound column is absolutely vertically ground flat, producing different effects according to the curvature of the violin panel and backboard. The curvature is small, it's okay, but when pulled again, the second string sometimes produces a slight hissing and rough sound; If the curvature is large, it will produce a squeaking sound.

2. The end face of the sound column is slightly flat, slightly inclined, and the center of the end face is slightly concave, leaving rough edges on the circumference without polishing. It is very good for violins with small curvature between the panel and backboard, with beautiful sound and no hissing or rough sound on the second string; The curve is slightly larger and there is no creaking sound. optimal.

3. The slope of the end face of the sound column is appropriate, the contact is tight without gaps, and the sound quality is ideal.  

4. The slope of the end face of the sound column is too small, there is a gap in contact, and the low side presses against the piano board, resulting in a slight hissing and rough sound.

5. The end face of the sound column has a steep slope and there is a gap in contact. When the high side presses against the piano board, there will be a squeaking sound. When pulled again, there will be a whistling sound in some phonemes.

 

5、 The position of the sound column and the sound of the violin:

1. Two experimental trajectory lines: measure the distance from the inner edge of the left sound hole to the bass beam with a hard paper sheet, and then measure the distance from the inner edge of the right sound hole to the sound column with a hard paper sheet. When the two distance values are equal, the longitudinal trajectory is tangent to the right sound hole side of the sound column and parallel to the strings. On the longitudinal trajectory, adjust the vertical distance between the column below the panel and the horsefoot above the panel to obtain the best sound quality. The lateral trajectory is tangent to the side of the column head and perpendicular to the strings.

2. When the vertical distance between the sound column below the panel and the horsefoot above the panel is 0 on the longitudinal trajectory, the E-string sound becomes thinner; A string becomes stiff; The changes in D and G strings are not significant. When the distance is 3 millimeters, the E string, A string, D string, and G string all sound normally and have the best timbre. When the distance is 5 millimeters, the E string, A string, D string, and G string all have normal pronunciation and good timbre. When the distance is 8 millimeters, the four strings produce uneven sound, but the E string is good and the particularly high grip position is very beautiful; A string is empty; The D and G strings become a bit murky. When the distance is 12 millimeters, the E-string becomes like the sound of a flute, and a whistling sound is produced at several high positions; The pronunciation of string A is uneven, producing a roaring sound; D string is as empty as wood; The G string produces a gurgling sound.

3. Based on a vertical distance of 3 millimeters between the sound column and the horsefoot, when the outer side of the sound column (on the right side of the sound hole) is tangent to the longitudinal trajectory on the horizontal trajectory, the volume of the four strings is uniform and the sound quality is optimal. When the sound column moves 3 millimeters to the right sound hole, the sound of the E-string becomes thinner; A string becomes stiff; D string and G string are better. When the sound column moves 3 millimeters towards the bass beam, the sound of the E-string becomes thicker; A string hair wood; D string is average; The G string becomes bright and resonant. When the sound column moves 7 millimeters towards the bass beam, the sound of the E-string sounds like it comes from the resonant steel tube under the xylophone; A string sounds like the midrange of a flute; Difficulty pronouncing the D string; The G string is severely strained.

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